Ole Gunnar Dahlhaug
Om
Jeg er maskin ingeniør og er interessert i teknologi knyttet til fornybar energi. Vannturbiner er fasinerende og med jobben som professor på Vannkraftlaboratoriet hos NTNU har jeg gode muligheter til å jobbe med forskning knyttet til disse. Min bakgrunn som flymekanikker kommer godt med når man jobber med modeller i laboratoriet.
Jeg jobber også for Norsk Vannkraftsenter som er et nasjonalt samlende senter for å sikre og videreutvikle undervisning og forskning innen vannkraftteknologi. Her er det mange utfordringer som gir et godt grunnlag for å opprettholde et høyt teknologisk nivå på vår forskning og undervisning i fremtiden.I 2016 så ble NTNU vertskap for HydroCen som er en nyopprettet FME innen vannkraftteknologi, og her sitter jeg i ledergruppen.
Spesialområder:
• Mekanisk utstyr i vannkraftanlegg
• Virkningsgradsmåling av prototype pumper og turbiner
• Modelltester av pumper og turbiner
• Pumpe-/ Turbin-design
• Sanderosjon i turbiner
• Drift og vedlikehold av turbiner
• Design av vind- og tidevannsturbiner
Praksis:
1983 - 1986 Luftforsvaret, Ørlandet Flystasjon, Flymotortekniker
1992 - 1993 Forsker ved SINTEF Strømningsmaskiner
1997 - 1999 Forsker/gruppeleder ved SINTEF Energiforskning AS
1999 - 2003 1. Amanuensis ved institutt for termisk energi og vannkraft, NTNU
2003 - 2004 1. Amanuensis ved Kathmandu University
2003 - 2004 Forsker ved HydroLab på deltid, Kathmandu, Nepal
2004 - 2005 1. Amanuensis ved institutt for energi og prosessteknikk, NTNU
2005 - 2008 Professor ved institutt for energi og prosessteknikk, NTNU
2008 - 2010 Teknisk leder for ChapDrive as og DynaVec as
2010 - 2012 Professor ved institutt for energi og prosessteknikk, NTNU
2012 - 2013 Prosjekt ingeniør ved SN Power Peru i Lima.
2013 - 2022 Professor ved institutt for energi og prosessteknikk, NTNU
2014 - 2015 Leder for Norsk vannkraftsenter, NVKS
2016 - 2022 Medlem av ledergruppen til HydroCen
2019 - 2020 Leder for HydroCen
2020 - Leder for European Energy Research Alliance; EERA, Joint Program on Hydropower
2022 - Professor ved Kathmandu University, Nepal
Publikasjoner
2022
-
Acharya, Nirmal;
Gautam, Saroj;
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar.
(2022)
Development of simplified model for prediction of sediment induced erosion in Francis turbine’s sidewall gaps.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037 (012016).
Vitenskapelig artikkel
-
Acharya, Nirmal;
Gautam, Saroj;
Chitrakar, Sailesh;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2022)
Application of hydro-abrasive erosion model from IEC 62364:2019 standard in Francis turbines.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1079.
Vitenskapelig artikkel
-
Gautam, Saroj;
Acharya, Nirmal;
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2022)
Sediment erosion in the labyrinths of Francis turbine: A numerical study.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037 (01203).
Vitenskapelig artikkel
-
Gautam, Saroj;
Acharya, Nirmal;
Lama, Ram;
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Zhu, Baoshan;
Dahlhaug, Ole Gunnar.
(2022)
Numerical and experimental investigation of erosive wear in Francis runner blade optimized for sediment laden hydropower projects in Nepal.
Sustainable Energy Technologies and Assessments.
volum 51.
Vitenskapelig artikkel
-
Gautam, Saroj;
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2022)
Numerical investigation of a Pelton turbine at several operating conditions.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037.
Vitenskapelig artikkel
-
Kverno, Johannes Opedal;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2022)
High flexibility in Francis turbine operation and design philosophy: A review.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037 (1).
Vitenskapelig oversiktsartikkel/review
-
Lazarevikj, Marija;
Stojkovski, Filip;
Markov, Zoran;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2022)
Parameter based tool for Francis turbine guide vanes design using coupled MATLAB-ANSYS approach.
Journal of Sustainable Development of Energy, Water and Environment Systems.
volum 10 (3).
Vitenskapelig artikkel
2021
-
Acharya, Nirmal;
Gautam, Saroj;
Chitrakar, Sailesh;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2021)
Leakage Vortex Progression through a Guide Vane’s Clearance Gap and the Resulting Pressure Fluctuation in a Francis Turbine.
Energies.
volum 14 (14).
Vitenskapelig artikkel
-
Acharya, Nirmal;
Trivedi, Chirag;
Gautam, Saroj;
Dahlhaug, Ole Gunnar.
(2021)
Investigation of sediment erosion phenomenon for different blade angle distribution in Francis runner.
IOP Conference Series: Earth and Environmental Science (EES).
volum 174.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Bakken, Tor Haakon;
Hultgren, Liv Randi;
Bergmann-Paulsen, Jonas.
(2021)
Norge må bygge ut mer vannkraft.
Adresseavisen.
Kronikk
-
Dahlhaug, Ole Gunnar;
Jørgen Ranum, Krokstad.
(2021)
Vind- og vannkraften kan gjøre Norge 100 prosent fornybar.
Adresseavisen.
Kronikk
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar;
Sigurdsson, Bjarki;
Tengs, Erik Os.
(2021)
Modal testing of the Francis-99 runner.
IOP Conference Series: Earth and Environmental Science (EES).
volum 774 (1).
Vitenskapelig artikkel
-
Stojkovski, Filip;
Lazarevikj, Marija;
Markov, Zoran;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2021)
Constraints of Parametrically Defined Guide Vanes for a High-Head Francis Turbine.
Energies.
volum 14 (9).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar;
Lee, Young Ho;
Zhongdong, Qian.
(2021)
Current research in hydraulic turbines against sediment erosion: International partnership and collaborations.
IOP Conference Series: Earth and Environmental Science (EES).
volum 627.
Vitenskapelig artikkel
2020
-
Agnalt, Einar;
Solemslie, Bjørn Winther;
Storli, Pål-Tore Selbo;
Dahlhaug, Ole Gunnar.
(2020)
The Rotor-Stator Interaction Onboard a Low Specific speed Francis Turbine.
International Journal of Fluid Machinery and Systems.
volum 13 (2).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Solemslie, Bjørn Winther;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2020)
Review on numerical techniques applied in impulse hydro turbines.
Renewable Energy.
volum 159.
Vitenskapelig oversiktsartikkel/review
-
Iliev, Igor;
Tengs, Erik Os;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2020)
Optimization of Francis Turbines for Variable Speed Operation Using Surrogate Modeling Approach.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 142 (10).
Vitenskapelig artikkel
-
Støren, Gine Kirkebøen;
Dahlhaug, Ole Gunnar;
Solemslie, Bjørn Winther.
(2020)
Signature Investigation of Typical Faults on Francis Turbines.
Journal of Physics: Conference Series (JPCS).
volum 1608.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2020)
Numerical study of a Francis turbine over wide operating range: Some practical aspects of verification.
Sustainability.
volum 10 (12).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Iliev, Igor;
Dahlhaug, Ole Gunnar;
Zoran, Markov;
Engstrom, Fredrik;
Lysaker, Henning.
(2020)
Investigation of a Francis turbine during speed variation: Inception of cavitation.
Renewable Energy.
volum 166 (4).
Vitenskapelig artikkel
-
Volent, Eirik;
Sagmo, Kristian Forfot;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2020)
Experimental Study of Flow Structure in Converging–Diverging Axisymmetric Geometry.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 142 (4).
Vitenskapelig artikkel
2019
-
Acharya, Nirmal;
Trivedi, Chirag;
Wahl, Nina Marie;
Gautam, S;
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar.
(2019)
Numerical study of sediment erosion in guide vanes of a high head Francis turbine.
Journal of Physics: Conference Series (JPCS).
volum 1266 (012004).
Vitenskapelig artikkel
-
Agnalt, Einar;
Iliev, Igor;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2019)
On the Rotor Stator Interaction Effects of Low Specific Speed Francis Turbines.
International Journal of Rotating Machinery.
volum 2019.
Vitenskapelig artikkel
-
Agnalt, Einar;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2019)
Onboard measurements of pressure pulsations in a high head Francis model runner.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (2).
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Tengs, Erik Os;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2019)
An Experimental Investigation of the Hydroynamic Damping of Vibrating Hydrofoils.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (6).
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Tengs, Erik Os;
Solemslie, Bjørn Winther;
Østby, Petter Thorvald Krogh;
Dahlhaug, Ole Gunnar.
(2019)
Damping Measurements on a Multi-Blade Cascade with Multiple Degrees of Freedom: A Francis-99 Test Case.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2019)
Development of a test rig for investigating the flow field around guide vanes of Francis turbines.
Flow Measurement and Instrumentation.
volum 70.
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2019)
The numerical and experimental investigation of erosion induced leakage flow through guide vanes of Francis turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (7).
Vitenskapelig artikkel
-
Iliev, Igor;
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2019)
Variable-speed operation and pressure pulsations in a Francis turbine and a pump-turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240.
Vitenskapelig artikkel
-
Iliev, Igor;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2019)
Variable-speed operation of Francis turbines: A review of the perspectives and challenges.
Renewable and Sustainable Energy Reviews.
volum 103.
Vitenskapelig oversiktsartikkel/review
-
Neopane, Hari Prasad;
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar.
(2019)
Role of Turbine Testing Lab for overcoming the challenges related to hydropower development in Nepal.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (4).
Vitenskapelig artikkel
-
Nordvik, Andreas;
Iliev, Igor;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2019)
Numerical prediction of hill charts of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 1266 (1).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2019)
Pressure Pulsations and Fatigue Loads in High Head Francis Turbines.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (2).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar;
Brandåstrø, Bård Aslak.
(2019)
Signature analysis of characteristic frequencies in a Francis turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (7).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2019)
A comprehensive review of verification and validation techniques applied to hydraulic turbines.
International Journal of Fluid Machinery and Systems.
volum 12 (4).
Vitenskapelig oversiktsartikkel/review
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2019)
Francis-99 Workshop 3: Fluid structure interaction.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Volent, Eirik;
Dahlhaug, Ole Gunnar;
Tengs, Erik Os.
(2019)
Study of flow structure in erosion prone complex geometries.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240.
Vitenskapelig artikkel
-
Østby, Petter Thorvald Krogh;
Agnalt, Einar;
Haugen, Bjørn;
Billdal, Jan Tore;
Dahlhaug, Ole Gunnar.
(2019)
Fluid structure interaction of Francis-99 turbine and experimental validation.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
2018
-
Agnalt, Einar;
Østby, Petter Thorvald Krogh;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2018)
Experimental Study of a Low-Specific Speed Francis Model Runner during Resonance.
Shock and Vibration.
volum 2018.
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Solemslie, Bjørn Winther;
Østby, Petter Thorvald Haug;
Dahlhaug, Ole Gunnar.
(2018)
Hydrodynamic Damping of a Fluttering Hydrofoil in High-speed Flows.
International Journal of Fluid Machinery and Systems.
volum 11 (2).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar;
Neopane, Hari Prasad.
(2018)
Numerical investigation of the effet of leakage flow through erosion-induced clearance gaps of guide vanes on the performance of Francis turbines.
Engineering Applications of Computational Fluid Mechanics.
volum 12 (1).
Vitenskapelig artikkel
-
Iliev, Igor;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2018)
Simplified hydrodynamic analysis on the general shape of the hill charts of Francis turbines using shroud-streamline modeling.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Sannes, Daniel B.;
Iliev, Igor;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2018)
Pressure Pulsation in a High Head Francis Turbine Operating at Variable Speed.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Shrestha, K.P.;
Chitrakar, Sailesh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2018)
Performance Comparison of Optimized Designs of Francis Turbines Exposed to Sediment Erosion in various Operating Conditions.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Siemonsmeier, Marius;
Baumanns, Philipp;
van Bracht, Niklas;
Schönefeld, Maik;
Schönbauer, Andrea;
Moser, Albert;
Dahlhaug, Ole Gunnar;
Heidenreich, Sara.
(2018)
Hydropower Providing Flexibility for a Renewable Energy System: Three European Energy Scenarios.
2018.
Rapport
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2018)
A Reference Pelton Turbine - Three-Dimensional Flow Front Tracking Within a Rotating Pelton Bucket.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 140 (12).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2018)
Flow measurements around guide vanes of Francis turbine: A PIV approach.
Renewable Energy.
volum 126.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2018)
Experimental investigation of a Francis turbine during exigent ramping and transition into total load rejection.
Journal of Hydraulic Engineering.
volum 144 (6).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2018)
Experimental study of a Francis turbine under variable-speed and discharge conditions.
Renewable Energy.
volum 119.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2018)
Interaction between trailing edge wake and vortex rings in a Francis turbine at runaway condition: Compressible large eddy simulation.
Physics of Fluids.
volum 30 (7).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2018)
Investigation of the Unsteady Pressure Pulsations in the Prototype Francis Turbines -Part 1: Steady State Operating Conditions.
Mechanical systems and signal processing.
volum 108 (8).
Vitenskapelig artikkel
-
Ulvan, Vegard S.;
Kverno, Johannes O.;
Dahlhaug, Ole Gunnar.
(2018)
Pressure pulsations and hydraulic efficiency at Smeland power plant.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Volent, Eirik;
Dahlhaug, Ole Gunnar.
(2018)
Literature review relevant to particle erosion in complex geometries.
Journal of Physics: Conference Series (JPCS).
volum 1042.
Vitenskapelig artikkel
2017
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Francis-99 Workshop 2: transient operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 782 (1).
Leder
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2017)
Particle Image Velocimetry Investigation of the Leakage Flow Through Clearance Gaps in Cambered Hydrofoils.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 139 (9).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Neopane, Hari Prasad.
(2017)
Numerical and experimental study of the leakage flow in guide vanes with different hydrofoils.
Journal of Computational Design and Engineering.
volum 6 (2).
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar.
(2017)
Norsk vannkraft kan utnyttes bedre.
Adresseavisen.
Kronikk
-
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2017)
Experimental investigation of air injection in high head Francis turbines.
International journal on hydropower and dams.
volum 24.
Vitenskapelig artikkel
-
Gong, Ruzhi;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Blade passage modeling strategy for hydraulic turbine.
International Journal of Fluid Machinery and Systems.
volum 10 (4).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2017)
Effects of sediment erosion in guide vanes of Francis turbine.
Wear.
volum 390-391.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2017)
Sediment erosion induced leakage flow from guide vane clearance gap in a low specific speed Francis turbine.
Renewable Energy.
volum 107.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2017)
Investigations of unsteady pressure loading in a Francis turbine during variable-speed operation.
Renewable Energy.
volum 113.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2017)
Investigation of the unsteady pressure pulsations in the prototype Francis turbines during load variation and startup.
Journal of Renewable and Sustainable Energy.
volum 9 (6).
Vitenskapelig artikkel
-
Østby, Petter Thorvald Haug;
Billdal, Jan Tore;
Haugen, Bjørn;
Dahlhaug, Ole Gunnar.
(2017)
On the relation between friction losses and pressure pulsations caused by Rotor Stator interaction on the Francis-99 turbine.
Journal of Physics: Conference Series (JPCS).
volum 782 (1).
Vitenskapelig artikkel
2016
-
Bergan, Carl Werdelin;
Goyal, Rahul;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Experimental Investigation of a High Head Model Francis Turbine During Steady-State Operation at Off-Design Conditions.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Brende, Hege;
Dahlhaug, Ole Gunnar;
Bruland, Oddbjørn;
Helland, Ingeborg Palm.
(2016)
Vannkraft er det nye blå gullet for Norge.
Aftenposten (morgenutg. : trykt utg.).
Kronikk
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2016)
Study of the simultaneous effects of secondary flow and sediment erosion in Francis turbines.
Renewable Energy.
volum 97.
Vitenskapelig oversiktsartikkel/review
-
Chitrakar, Sailesh;
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Neopane, Hari Prasad.
(2016)
Numerical investigation of the flow phenomena around a low specific speed Francis turbine’s guide vane cascade.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar.
(2016)
Vannkraftens renessanse.
Adresseavisen.
Kronikk
-
Dahlhaug, Ole Gunnar.
(2016)
Vannkraftens rennessanse.
Adresseavisen.
Kronikk
-
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2016)
Evaluation of runner cone extension to dampen pressure pulsations in a Francis model turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49 (8).
Vitenskapelig artikkel
-
Goyal, Rahul;
Bergan, Carl Werdelin;
Cervantes, Michel;
Gandhi, B. K.;
Dahlhaug, Ole Gunnar.
(2016)
Experimental investigation on a high head model Francis turbine during load rejection.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Goyal, Rahul;
Trivedi, Chirag;
Gandhi, BK;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Transient pressure measurements at part load operating condition of a high head model Francis turbine.
Sādhanā (Bangalore).
volum 41 (11).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2016)
A reference Pelton turbine - High speed visualization in the rotating frame.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2016)
Velocity and pressure measurements in guide vane clearance gap of a low specific speed Francis turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2016)
Design and development of guide vane cascade for a low speed number Francis turbine.
Journal of Hydrodynamics.
volum 28 (4).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Experimental and Numerical Studies of a High-Head Francis Turbine: A Review of the Francis-99 Test Case.
Energies.
volum 9 (2).
Vitenskapelig oversiktsartikkel/review
-
Trivedi, Chirag;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Numerical techniques applied to hydraulic turbines: a perspective review.
Applied Mechanics Review.
volum 68:010802 (1).
Vitenskapelig oversiktsartikkel/review
-
Østby, Petter Thorvald Haug;
Billdal, Jan Tore;
Sivertsen, Kjell;
Haugen, Bjørn;
Dahlhaug, Ole Gunnar.
(2016)
Dynamic Stresses In High Head Francis Turbines.
International journal on hydropower and dams.
volum 3.
Vitenskapelig artikkel
2015
-
Bergan, Carl Werdelin;
Amiri, Kaveh;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2015)
Preliminary Measurements of the Radial Velocity in the Francis-99 Draft Tube Cone.
Journal of Physics: Conference Series (JPCS).
volum 579 (1).
Vitenskapelig artikkel
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2015)
Francis-99 Workshop 1: steady operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 579.
Leder
-
Holst, Martin;
Dahlhaug, Ole Gunnar;
Faudot, Celine.
(2015)
CFD Analysis of Wave-Induced Loads on Tidal Turbine Blades.
IEEE Journal of Oceanic Engineering.
volum 40 (3).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2015)
Studying the effects of jet alignment in Pelton units.
International journal on hydropower and dams.
volum 22 (3).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2015)
Sediment erosion in hydro turbines and its effect on the flow around guide vanes of Francis turbine.
Renewable and Sustainable Energy Reviews.
volum 49.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Dahlhaug, Ole Gunnar;
Gandhi, BK.
(2015)
Experimental investigation of a high head Francis turbine during spin-no-load operation.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 137 (6).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Gandhi, BK;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2015)
Experimental investigations of a model Francis turbine during shutdown at synchronous speed.
Renewable Energy.
volum 83.
Vitenskapelig artikkel
2014
-
Dahlhaug, Ole Gunnar.
(2014)
Nøkkelen til en bedre verden.
Adresseavisen.
Kronikk
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2014)
A reference pelton turbine - design and efficiency measurements.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (1).
Vitenskapelig artikkel
-
Sundström, Joel;
Amiri, Kaveh;
Bergan, Carl Werdelin;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2014)
LDA measurements in the Francis-99 draft tube cone.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (1).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Bhupendrakumar, Gandhi;
Dahlhaug, Ole Gunnar.
(2014)
Pressure measurements on a high-head Francis turbine during load acceptance and rejection.
Journal of Hydraulic Research.
volum 52 (2).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Bhupendrakumar, Gandhi;
Dahlhaug, Ole Gunnar.
(2014)
Transient pressure measurements on a high head model Francis turbine during emergency shutdown, total load rejection, and runaway.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 136 (12).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Gandhi, B.K.;
Dahlhaug, Ole Gunnar.
(2014)
Experimental investigations of transient pressure variations in a high head model Francis turbine during start-up and shutdown.
Journal of Hydrodynamics.
volum 26 (2).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Gandhi, Bhupendra Kumar;
Dahlhaug, Ole Gunnar.
(2014)
Pressure measurements on a high-head Francis turbine during load acceptance and rejection.
Journal of Hydraulic Research.
volum 52 (2).
Vitenskapelig artikkel
2013
-
Fossum, Peter Kalsaas;
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2013)
Design and Fatigue Performance of Large Utility-Scale Wind Turbine Blades.
Journal of solar energy engineering.
volum 135 (3).
Vitenskapelig artikkel
-
Shrestha, Krishna Prasad;
Dahlhaug, Ole Gunnar;
Thapa, Bhola;
Neopane, Hari Prasad;
Gurung, Nikhel;
Kayastha, Atmaram.
(2013)
Optimized design of Francis runner for sand laden water.
Hydro Nepal: Journal of Water, Energy and Environment.
volum July (13).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Gandhi, B. K.;
Dahlhaug, Ole Gunnar.
(2013)
Experimental and Numerical Studies for a High Head Francis Turbine at Several Operating Points.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 135 (11).
Vitenskapelig artikkel
2012
-
Faudot, Celine;
Dahlhaug, Ole Gunnar.
(2012)
Prediction of Wave Loads on Tidal Turbine Blades.
Energy Procedia.
volum 20.
Vitenskapelig artikkel
-
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2012)
Effect of Pitch and Safety System Design on Dimensioning Loads for Offshore Wind Turbines During Grid Fault.
Energy Procedia.
volum 0 (24).
Vitenskapelig artikkel
-
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar;
Cervantes, Michel.
(2012)
The effect of sediment characteristics for predicting erosion on Francis turbines blades.
International journal on hydropower and dams.
volum 19 (1).
Vitenskapelig artikkel
-
Neopane, Hari Prasad;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2012)
PARTICLE VELOCITY MEASUREMENT IN SWIRL FLOW, LABORATORY STUDIES.
Kathmandu University Journal of Science, Engineering and Technology.
volum 8 (1).
Vitenskapelig oversiktsartikkel/review
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2012)
A Reference Pelton Turbine Design.
IOP Conference Series: Earth and Environmental Science (EES).
volum 15.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2012)
Current research in hydraulic turbines for handling sediments.
Energy.
volum 47 (1).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2012)
Empirical modelling of sediment erosion in Francis turbines.
Energy.
volum 41 (1).
Vitenskapelig artikkel
2011
-
Anne-Lise, Aakervik;
Dahlhaug, Ole Gunnar.
(2011)
Vannkraft i vinden.
Energi.
publications.INTERVJUSKRIFTL
-
Dahlhaug, Ole Gunnar;
Valmot, Odd Richard.
(2011)
Løste en av vannkraftens største utfordringer.
Teknisk Ukeblad.
publications.INTERVJUSKRIFTL
-
Faudot, Celine;
Dahlhaug, Ole Gunnar.
(2011)
Tidal Turbine Blades: Design and Dynamic Loads Estimation Using CFD and Blade Element Momentum Theory (OMAE2011-49740).
30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. V.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2011)
A Conceptual Design Method for Parametric Study of Blades for Offshore Wind Turbines (OMAE2011-49743).
30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. V.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2011)
Rotor Design for a 10 MW Offshore Wind Turbine.
Proceedings of the Twenty-First (2011) International Offshore and Polar Engineering Conference.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar;
Cervantes, Michel.
(2011)
Sediment erosion in hydraulic turbines.
Global Journal of researches in engineering.
volum 11 (6).
Vitenskapelig oversiktsartikkel/review
2010
-
Dahlhaug, Ole Gunnar;
Skåre, Per Egil;
Mossing, V.;
Gutierrez, A..
(2010)
Erosion resistant coatings for Francis runner and guidevanes.
International journal on hydropower and dams.
volum 17 (2).
Vitenskapelig artikkel
2009
-
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2009)
Turbine Testing Laboratory and its Role in Hydropower.
Hydro Nepal: Journal of Water, Energy and Environment.
Vitenskapelig artikkel
2008
-
Bajracharya, Tri ratna;
Acharya, B.;
Joshi, C.B.;
Saini, R.P.;
Dahlhaug, Ole Gunnar.
(2008)
Sand erosion of Pelton turbine nozzles and buckets: A case study of Chilime Hydropower Plant.
Wear.
volum 264 (3-4).
Vitenskapelig artikkel
2007
-
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Ramdal, Jørgen;
Brandåstrø, Bård Aslak.
(2007)
Tokke model test 2006-2007 NTNU reference runner.
2007.
Rapport
-
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Ramdal, Jørgen;
Brandåstrø, Bård Aslak.
(2007)
Tokke model test 2006-2007 VA-Tech runner.
2007.
Rapport
-
Francke, Håkon Hjort;
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Ramdal, Jørgen;
Kobro, Einar.
(2007)
Saurdal pumpekraftverk - Virkningsgrads- og falltapsmålinger.
2007.
Rapport
2006
-
Bajracharya, Tri ratna;
Joshi, C.B.;
Saini, R.P.;
Dahlhaug, Ole Gunnar.
(2006)
Correlation between sand led erosion of Pelton buckets and efficiency losses in high head hydropower schemes.
Journal of the institute of engineering.
volum 6 (1).
Vitenskapelig artikkel
-
Skåre, Per Egil;
Dahlhaug, Ole Gunnar.
(2006)
Tapsanalyse og Skalaeffekt.
2006.
Rapport
-
Skåre, Per Egil;
Dahlhaug, Ole Gunnar;
Kobro, Einar.
(2006)
Sandslitasje i Pelton løpehjul.
2006.
Rapport
2005
-
Dahlhaug, Ole Gunnar;
Støle, Haakon;
Pradhan, Pratik;
Joshi, Pabitra;
Bishwakarma, Meg.
(2005)
Sediment and efficiency measurement at Khimti I hydropower plant - Monsoon 2004.
2005.
Rapport
2004
-
Dahlhaug, Ole Gunnar;
Pratik, Pradhan.
(2004)
Efficiency measurements at Andi Khola Hydropower Plant.
2004.
Rapport
-
Dahlhaug, Ole Gunnar;
Støle, Haakon;
Pradhan, Pratik;
Joshi, Pabitra;
Bishwakarma, Meg.
(2004)
Sediment and efficiency measurements at Jhimruk Hydropower Plant - Monsoon 2003.
2004.
Rapport
2003
-
Dahlhaug, Ole Gunnar;
Brekke, Hermod.
(2003)
Innovations in Turbine Design and Generator Condition Assesment.
Hydro Review Worldwide.
volum II (number 4, september).
Vitenskapelig artikkel
2002
-
Dahlhaug, Ole Gunnar.
(2002)
Utvikling av tidevannsturbin : prototype på 50 meters dyp i Kvalsundet.
Xergi.
volum 42 (4).
Populærvitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Brandåstrø, Bård Aslak.
(2002)
Virkningsgrad- og falltapsmåling ved Breivikbotn Kraftverk.
2002.
Rapport
-
Dahlhaug, Ole Gunnar;
Brandåstrø, Bård Aslak.
(2002)
Virkningsgrad- og falltapsmålinger ved Øvre Porsa Kraftverk.
2002.
Rapport
-
Dahlhaug, Ole Gunnar;
Martinsen, Anna Louise.
(2002)
Nasjonalt kontroll-laboratorium for små turbiner.
Xergi.
volum 42 (4).
Populærvitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2002)
Status for mini- og mikrokraftverk i Norge.
2002.
Rapport
-
Knudsen, Sverre D;
Dahlhaug, Ole Gunnar;
Kjeldsen, Morten;
Børresen, Bjarne.
(2002)
Turbomachinery Calculations at highly off-design conditions.
International Journal of Applied Mechanics and Engineering.
volum 7 (1).
Vitenskapelig artikkel
-
Martinsen, Anna Louise;
Dahlhaug, Ole Gunnar.
(2002)
Miljøtilpasset el-kraftproduksjon ved små vannkraftverk i distrikts-Norge.
2002.
Rapport
2000
-
Dahlhaug, Ole Gunnar;
Brekke, Hermod.
(2000)
HIGH TECNOLOGY VERSUS LOW COSTS FOR SMALL HYDRO FRANCIS TURBINES.
SMALL HYDRO 2000, Conference Proceedings, 8-12 May 2000.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Skåre, Per Egil;
Børresen, Bjarne.
(2000)
CFD-CALCULATION OF SWIRLFLOW IN A CONICAL DIFFUSER AND BEND.
IAHR Symposium, Hydraulic Machinery and Systems. Conference Proceedings.
Vitenskapelig artikkel
1998
-
Dahlhaug, Ole Gunnar.
(1998)
A study of swirl flow in draft tubes.
1998.
Doktorgradsavhandling
-
Dahlhaug, Ole Gunnar.
(1998)
Termodynamisk virkningsgradsmåling for lave fallhøyder.
1998.
Rapport
1996
-
Dahlhaug, Ole Gunnar;
Vekve, Thomas.
(1996)
LDV-measurements in circular sections.
1996.
Rapport
Tidsskriftspublikasjoner
-
Acharya, Nirmal;
Gautam, Saroj;
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar.
(2022)
Development of simplified model for prediction of sediment induced erosion in Francis turbine’s sidewall gaps.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037 (012016).
Vitenskapelig artikkel
-
Acharya, Nirmal;
Gautam, Saroj;
Chitrakar, Sailesh;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2022)
Application of hydro-abrasive erosion model from IEC 62364:2019 standard in Francis turbines.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1079.
Vitenskapelig artikkel
-
Gautam, Saroj;
Acharya, Nirmal;
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2022)
Sediment erosion in the labyrinths of Francis turbine: A numerical study.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037 (01203).
Vitenskapelig artikkel
-
Gautam, Saroj;
Acharya, Nirmal;
Lama, Ram;
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Zhu, Baoshan;
Dahlhaug, Ole Gunnar.
(2022)
Numerical and experimental investigation of erosive wear in Francis runner blade optimized for sediment laden hydropower projects in Nepal.
Sustainable Energy Technologies and Assessments.
volum 51.
Vitenskapelig artikkel
-
Gautam, Saroj;
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2022)
Numerical investigation of a Pelton turbine at several operating conditions.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037.
Vitenskapelig artikkel
-
Kverno, Johannes Opedal;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2022)
High flexibility in Francis turbine operation and design philosophy: A review.
IOP Conference Series: Earth and Environmental Science (EES).
volum 1037 (1).
Vitenskapelig oversiktsartikkel/review
-
Lazarevikj, Marija;
Stojkovski, Filip;
Markov, Zoran;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2022)
Parameter based tool for Francis turbine guide vanes design using coupled MATLAB-ANSYS approach.
Journal of Sustainable Development of Energy, Water and Environment Systems.
volum 10 (3).
Vitenskapelig artikkel
-
Acharya, Nirmal;
Gautam, Saroj;
Chitrakar, Sailesh;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2021)
Leakage Vortex Progression through a Guide Vane’s Clearance Gap and the Resulting Pressure Fluctuation in a Francis Turbine.
Energies.
volum 14 (14).
Vitenskapelig artikkel
-
Acharya, Nirmal;
Trivedi, Chirag;
Gautam, Saroj;
Dahlhaug, Ole Gunnar.
(2021)
Investigation of sediment erosion phenomenon for different blade angle distribution in Francis runner.
IOP Conference Series: Earth and Environmental Science (EES).
volum 174.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Bakken, Tor Haakon;
Hultgren, Liv Randi;
Bergmann-Paulsen, Jonas.
(2021)
Norge må bygge ut mer vannkraft.
Adresseavisen.
Kronikk
-
Dahlhaug, Ole Gunnar;
Jørgen Ranum, Krokstad.
(2021)
Vind- og vannkraften kan gjøre Norge 100 prosent fornybar.
Adresseavisen.
Kronikk
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar;
Sigurdsson, Bjarki;
Tengs, Erik Os.
(2021)
Modal testing of the Francis-99 runner.
IOP Conference Series: Earth and Environmental Science (EES).
volum 774 (1).
Vitenskapelig artikkel
-
Stojkovski, Filip;
Lazarevikj, Marija;
Markov, Zoran;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2021)
Constraints of Parametrically Defined Guide Vanes for a High-Head Francis Turbine.
Energies.
volum 14 (9).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar;
Lee, Young Ho;
Zhongdong, Qian.
(2021)
Current research in hydraulic turbines against sediment erosion: International partnership and collaborations.
IOP Conference Series: Earth and Environmental Science (EES).
volum 627.
Vitenskapelig artikkel
-
Agnalt, Einar;
Solemslie, Bjørn Winther;
Storli, Pål-Tore Selbo;
Dahlhaug, Ole Gunnar.
(2020)
The Rotor-Stator Interaction Onboard a Low Specific speed Francis Turbine.
International Journal of Fluid Machinery and Systems.
volum 13 (2).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Solemslie, Bjørn Winther;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2020)
Review on numerical techniques applied in impulse hydro turbines.
Renewable Energy.
volum 159.
Vitenskapelig oversiktsartikkel/review
-
Iliev, Igor;
Tengs, Erik Os;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2020)
Optimization of Francis Turbines for Variable Speed Operation Using Surrogate Modeling Approach.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 142 (10).
Vitenskapelig artikkel
-
Støren, Gine Kirkebøen;
Dahlhaug, Ole Gunnar;
Solemslie, Bjørn Winther.
(2020)
Signature Investigation of Typical Faults on Francis Turbines.
Journal of Physics: Conference Series (JPCS).
volum 1608.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Iliev, Igor;
Dahlhaug, Ole Gunnar.
(2020)
Numerical study of a Francis turbine over wide operating range: Some practical aspects of verification.
Sustainability.
volum 10 (12).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Iliev, Igor;
Dahlhaug, Ole Gunnar;
Zoran, Markov;
Engstrom, Fredrik;
Lysaker, Henning.
(2020)
Investigation of a Francis turbine during speed variation: Inception of cavitation.
Renewable Energy.
volum 166 (4).
Vitenskapelig artikkel
-
Volent, Eirik;
Sagmo, Kristian Forfot;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2020)
Experimental Study of Flow Structure in Converging–Diverging Axisymmetric Geometry.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 142 (4).
Vitenskapelig artikkel
-
Acharya, Nirmal;
Trivedi, Chirag;
Wahl, Nina Marie;
Gautam, S;
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar.
(2019)
Numerical study of sediment erosion in guide vanes of a high head Francis turbine.
Journal of Physics: Conference Series (JPCS).
volum 1266 (012004).
Vitenskapelig artikkel
-
Agnalt, Einar;
Iliev, Igor;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2019)
On the Rotor Stator Interaction Effects of Low Specific Speed Francis Turbines.
International Journal of Rotating Machinery.
volum 2019.
Vitenskapelig artikkel
-
Agnalt, Einar;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2019)
Onboard measurements of pressure pulsations in a high head Francis model runner.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (2).
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Tengs, Erik Os;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2019)
An Experimental Investigation of the Hydroynamic Damping of Vibrating Hydrofoils.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (6).
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Tengs, Erik Os;
Solemslie, Bjørn Winther;
Østby, Petter Thorvald Krogh;
Dahlhaug, Ole Gunnar.
(2019)
Damping Measurements on a Multi-Blade Cascade with Multiple Degrees of Freedom: A Francis-99 Test Case.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2019)
Development of a test rig for investigating the flow field around guide vanes of Francis turbines.
Flow Measurement and Instrumentation.
volum 70.
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2019)
The numerical and experimental investigation of erosion induced leakage flow through guide vanes of Francis turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (7).
Vitenskapelig artikkel
-
Iliev, Igor;
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2019)
Variable-speed operation and pressure pulsations in a Francis turbine and a pump-turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240.
Vitenskapelig artikkel
-
Iliev, Igor;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2019)
Variable-speed operation of Francis turbines: A review of the perspectives and challenges.
Renewable and Sustainable Energy Reviews.
volum 103.
Vitenskapelig oversiktsartikkel/review
-
Neopane, Hari Prasad;
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar.
(2019)
Role of Turbine Testing Lab for overcoming the challenges related to hydropower development in Nepal.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (4).
Vitenskapelig artikkel
-
Nordvik, Andreas;
Iliev, Igor;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2019)
Numerical prediction of hill charts of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 1266 (1).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2019)
Pressure Pulsations and Fatigue Loads in High Head Francis Turbines.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (2).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar;
Brandåstrø, Bård Aslak.
(2019)
Signature analysis of characteristic frequencies in a Francis turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240 (7).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2019)
A comprehensive review of verification and validation techniques applied to hydraulic turbines.
International Journal of Fluid Machinery and Systems.
volum 12 (4).
Vitenskapelig oversiktsartikkel/review
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Nielsen, Torbjørn Kristian.
(2019)
Francis-99 Workshop 3: Fluid structure interaction.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Volent, Eirik;
Dahlhaug, Ole Gunnar;
Tengs, Erik Os.
(2019)
Study of flow structure in erosion prone complex geometries.
IOP Conference Series: Earth and Environmental Science (EES).
volum 240.
Vitenskapelig artikkel
-
Østby, Petter Thorvald Krogh;
Agnalt, Einar;
Haugen, Bjørn;
Billdal, Jan Tore;
Dahlhaug, Ole Gunnar.
(2019)
Fluid structure interaction of Francis-99 turbine and experimental validation.
Journal of Physics: Conference Series (JPCS).
volum 1296 (1).
Vitenskapelig artikkel
-
Agnalt, Einar;
Østby, Petter Thorvald Krogh;
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2018)
Experimental Study of a Low-Specific Speed Francis Model Runner during Resonance.
Shock and Vibration.
volum 2018.
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Solemslie, Bjørn Winther;
Østby, Petter Thorvald Haug;
Dahlhaug, Ole Gunnar.
(2018)
Hydrodynamic Damping of a Fluttering Hydrofoil in High-speed Flows.
International Journal of Fluid Machinery and Systems.
volum 11 (2).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Dahlhaug, Ole Gunnar;
Neopane, Hari Prasad.
(2018)
Numerical investigation of the effet of leakage flow through erosion-induced clearance gaps of guide vanes on the performance of Francis turbines.
Engineering Applications of Computational Fluid Mechanics.
volum 12 (1).
Vitenskapelig artikkel
-
Iliev, Igor;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2018)
Simplified hydrodynamic analysis on the general shape of the hill charts of Francis turbines using shroud-streamline modeling.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Sannes, Daniel B.;
Iliev, Igor;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2018)
Pressure Pulsation in a High Head Francis Turbine Operating at Variable Speed.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Shrestha, K.P.;
Chitrakar, Sailesh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2018)
Performance Comparison of Optimized Designs of Francis Turbines Exposed to Sediment Erosion in various Operating Conditions.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2018)
A Reference Pelton Turbine - Three-Dimensional Flow Front Tracking Within a Rotating Pelton Bucket.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 140 (12).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2018)
Flow measurements around guide vanes of Francis turbine: A PIV approach.
Renewable Energy.
volum 126.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2018)
Experimental investigation of a Francis turbine during exigent ramping and transition into total load rejection.
Journal of Hydraulic Engineering.
volum 144 (6).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2018)
Experimental study of a Francis turbine under variable-speed and discharge conditions.
Renewable Energy.
volum 119.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2018)
Interaction between trailing edge wake and vortex rings in a Francis turbine at runaway condition: Compressible large eddy simulation.
Physics of Fluids.
volum 30 (7).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2018)
Investigation of the Unsteady Pressure Pulsations in the Prototype Francis Turbines -Part 1: Steady State Operating Conditions.
Mechanical systems and signal processing.
volum 108 (8).
Vitenskapelig artikkel
-
Ulvan, Vegard S.;
Kverno, Johannes O.;
Dahlhaug, Ole Gunnar.
(2018)
Pressure pulsations and hydraulic efficiency at Smeland power plant.
Journal of Physics: Conference Series (JPCS).
volum 1042 (1).
Vitenskapelig artikkel
-
Volent, Eirik;
Dahlhaug, Ole Gunnar.
(2018)
Literature review relevant to particle erosion in complex geometries.
Journal of Physics: Conference Series (JPCS).
volum 1042.
Vitenskapelig artikkel
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Francis-99 Workshop 2: transient operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 782 (1).
Leder
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2017)
Particle Image Velocimetry Investigation of the Leakage Flow Through Clearance Gaps in Cambered Hydrofoils.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 139 (9).
Vitenskapelig artikkel
-
Chitrakar, Sailesh;
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Neopane, Hari Prasad.
(2017)
Numerical and experimental study of the leakage flow in guide vanes with different hydrofoils.
Journal of Computational Design and Engineering.
volum 6 (2).
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar.
(2017)
Norsk vannkraft kan utnyttes bedre.
Adresseavisen.
Kronikk
-
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2017)
Experimental investigation of air injection in high head Francis turbines.
International journal on hydropower and dams.
volum 24.
Vitenskapelig artikkel
-
Gong, Ruzhi;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2017)
Blade passage modeling strategy for hydraulic turbine.
International Journal of Fluid Machinery and Systems.
volum 10 (4).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2017)
Effects of sediment erosion in guide vanes of Francis turbine.
Wear.
volum 390-391.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2017)
Sediment erosion induced leakage flow from guide vane clearance gap in a low specific speed Francis turbine.
Renewable Energy.
volum 107.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Agnalt, Einar;
Dahlhaug, Ole Gunnar.
(2017)
Investigations of unsteady pressure loading in a Francis turbine during variable-speed operation.
Renewable Energy.
volum 113.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2017)
Investigation of the unsteady pressure pulsations in the prototype Francis turbines during load variation and startup.
Journal of Renewable and Sustainable Energy.
volum 9 (6).
Vitenskapelig artikkel
-
Østby, Petter Thorvald Haug;
Billdal, Jan Tore;
Haugen, Bjørn;
Dahlhaug, Ole Gunnar.
(2017)
On the relation between friction losses and pressure pulsations caused by Rotor Stator interaction on the Francis-99 turbine.
Journal of Physics: Conference Series (JPCS).
volum 782 (1).
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Goyal, Rahul;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Experimental Investigation of a High Head Model Francis Turbine During Steady-State Operation at Off-Design Conditions.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Brende, Hege;
Dahlhaug, Ole Gunnar;
Bruland, Oddbjørn;
Helland, Ingeborg Palm.
(2016)
Vannkraft er det nye blå gullet for Norge.
Aftenposten (morgenutg. : trykt utg.).
Kronikk
-
Chitrakar, Sailesh;
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar.
(2016)
Study of the simultaneous effects of secondary flow and sediment erosion in Francis turbines.
Renewable Energy.
volum 97.
Vitenskapelig oversiktsartikkel/review
-
Chitrakar, Sailesh;
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Neopane, Hari Prasad.
(2016)
Numerical investigation of the flow phenomena around a low specific speed Francis turbine’s guide vane cascade.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar.
(2016)
Vannkraftens renessanse.
Adresseavisen.
Kronikk
-
Dahlhaug, Ole Gunnar.
(2016)
Vannkraftens rennessanse.
Adresseavisen.
Kronikk
-
Gogstad, Peter Joachim;
Dahlhaug, Ole Gunnar.
(2016)
Evaluation of runner cone extension to dampen pressure pulsations in a Francis model turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49 (8).
Vitenskapelig artikkel
-
Goyal, Rahul;
Bergan, Carl Werdelin;
Cervantes, Michel;
Gandhi, B. K.;
Dahlhaug, Ole Gunnar.
(2016)
Experimental investigation on a high head model Francis turbine during load rejection.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Goyal, Rahul;
Trivedi, Chirag;
Gandhi, BK;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Transient pressure measurements at part load operating condition of a high head model Francis turbine.
Sādhanā (Bangalore).
volum 41 (11).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2016)
A reference Pelton turbine - High speed visualization in the rotating frame.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2016)
Velocity and pressure measurements in guide vane clearance gap of a low specific speed Francis turbine.
IOP Conference Series: Earth and Environmental Science (EES).
volum 49.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar.
(2016)
Design and development of guide vane cascade for a low speed number Francis turbine.
Journal of Hydrodynamics.
volum 28 (4).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Experimental and Numerical Studies of a High-Head Francis Turbine: A Review of the Francis-99 Test Case.
Energies.
volum 9 (2).
Vitenskapelig oversiktsartikkel/review
-
Trivedi, Chirag;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2016)
Numerical techniques applied to hydraulic turbines: a perspective review.
Applied Mechanics Review.
volum 68:010802 (1).
Vitenskapelig oversiktsartikkel/review
-
Østby, Petter Thorvald Haug;
Billdal, Jan Tore;
Sivertsen, Kjell;
Haugen, Bjørn;
Dahlhaug, Ole Gunnar.
(2016)
Dynamic Stresses In High Head Francis Turbines.
International journal on hydropower and dams.
volum 3.
Vitenskapelig artikkel
-
Bergan, Carl Werdelin;
Amiri, Kaveh;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2015)
Preliminary Measurements of the Radial Velocity in the Francis-99 Draft Tube Cone.
Journal of Physics: Conference Series (JPCS).
volum 579 (1).
Vitenskapelig artikkel
-
Cervantes, Michel;
Trivedi, Chirag;
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2015)
Francis-99 Workshop 1: steady operation of Francis turbines.
Journal of Physics: Conference Series (JPCS).
volum 579.
Leder
-
Holst, Martin;
Dahlhaug, Ole Gunnar;
Faudot, Celine.
(2015)
CFD Analysis of Wave-Induced Loads on Tidal Turbine Blades.
IEEE Journal of Oceanic Engineering.
volum 40 (3).
Vitenskapelig artikkel
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2015)
Studying the effects of jet alignment in Pelton units.
International journal on hydropower and dams.
volum 22 (3).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Dahlhaug, Ole Gunnar;
Thapa, Bhola.
(2015)
Sediment erosion in hydro turbines and its effect on the flow around guide vanes of Francis turbine.
Renewable and Sustainable Energy Reviews.
volum 49.
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Dahlhaug, Ole Gunnar;
Gandhi, BK.
(2015)
Experimental investigation of a high head Francis turbine during spin-no-load operation.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 137 (6).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Gandhi, BK;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2015)
Experimental investigations of a model Francis turbine during shutdown at synchronous speed.
Renewable Energy.
volum 83.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar.
(2014)
Nøkkelen til en bedre verden.
Adresseavisen.
Kronikk
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2014)
A reference pelton turbine - design and efficiency measurements.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (1).
Vitenskapelig artikkel
-
Sundström, Joel;
Amiri, Kaveh;
Bergan, Carl Werdelin;
Cervantes, Michel;
Dahlhaug, Ole Gunnar.
(2014)
LDA measurements in the Francis-99 draft tube cone.
IOP Conference Series: Earth and Environmental Science (EES).
volum 22 (1).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Bhupendrakumar, Gandhi;
Dahlhaug, Ole Gunnar.
(2014)
Pressure measurements on a high-head Francis turbine during load acceptance and rejection.
Journal of Hydraulic Research.
volum 52 (2).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Bhupendrakumar, Gandhi;
Dahlhaug, Ole Gunnar.
(2014)
Transient pressure measurements on a high head model Francis turbine during emergency shutdown, total load rejection, and runaway.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 136 (12).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Gandhi, B.K.;
Dahlhaug, Ole Gunnar.
(2014)
Experimental investigations of transient pressure variations in a high head model Francis turbine during start-up and shutdown.
Journal of Hydrodynamics.
volum 26 (2).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Gandhi, Bhupendra Kumar;
Dahlhaug, Ole Gunnar.
(2014)
Pressure measurements on a high-head Francis turbine during load acceptance and rejection.
Journal of Hydraulic Research.
volum 52 (2).
Vitenskapelig artikkel
-
Fossum, Peter Kalsaas;
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2013)
Design and Fatigue Performance of Large Utility-Scale Wind Turbine Blades.
Journal of solar energy engineering.
volum 135 (3).
Vitenskapelig artikkel
-
Shrestha, Krishna Prasad;
Dahlhaug, Ole Gunnar;
Thapa, Bhola;
Neopane, Hari Prasad;
Gurung, Nikhel;
Kayastha, Atmaram.
(2013)
Optimized design of Francis runner for sand laden water.
Hydro Nepal: Journal of Water, Energy and Environment.
volum July (13).
Vitenskapelig artikkel
-
Trivedi, Chirag;
Cervantes, Michel;
Gandhi, B. K.;
Dahlhaug, Ole Gunnar.
(2013)
Experimental and Numerical Studies for a High Head Francis Turbine at Several Operating Points.
Journal of Fluids Engineering - Trancactions of The ASME.
volum 135 (11).
Vitenskapelig artikkel
-
Faudot, Celine;
Dahlhaug, Ole Gunnar.
(2012)
Prediction of Wave Loads on Tidal Turbine Blades.
Energy Procedia.
volum 20.
Vitenskapelig artikkel
-
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2012)
Effect of Pitch and Safety System Design on Dimensioning Loads for Offshore Wind Turbines During Grid Fault.
Energy Procedia.
volum 0 (24).
Vitenskapelig artikkel
-
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar;
Cervantes, Michel.
(2012)
The effect of sediment characteristics for predicting erosion on Francis turbines blades.
International journal on hydropower and dams.
volum 19 (1).
Vitenskapelig artikkel
-
Neopane, Hari Prasad;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2012)
PARTICLE VELOCITY MEASUREMENT IN SWIRL FLOW, LABORATORY STUDIES.
Kathmandu University Journal of Science, Engineering and Technology.
volum 8 (1).
Vitenskapelig oversiktsartikkel/review
-
Solemslie, Bjørn Winther;
Dahlhaug, Ole Gunnar.
(2012)
A Reference Pelton Turbine Design.
IOP Conference Series: Earth and Environmental Science (EES).
volum 15.
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2012)
Current research in hydraulic turbines for handling sediments.
Energy.
volum 47 (1).
Vitenskapelig artikkel
-
Thapa, Biraj Singh;
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2012)
Empirical modelling of sediment erosion in Francis turbines.
Energy.
volum 41 (1).
Vitenskapelig artikkel
-
Anne-Lise, Aakervik;
Dahlhaug, Ole Gunnar.
(2011)
Vannkraft i vinden.
Energi.
publications.INTERVJUSKRIFTL
-
Dahlhaug, Ole Gunnar;
Valmot, Odd Richard.
(2011)
Løste en av vannkraftens største utfordringer.
Teknisk Ukeblad.
publications.INTERVJUSKRIFTL
-
Neopane, Hari Prasad;
Dahlhaug, Ole Gunnar;
Cervantes, Michel.
(2011)
Sediment erosion in hydraulic turbines.
Global Journal of researches in engineering.
volum 11 (6).
Vitenskapelig oversiktsartikkel/review
-
Dahlhaug, Ole Gunnar;
Skåre, Per Egil;
Mossing, V.;
Gutierrez, A..
(2010)
Erosion resistant coatings for Francis runner and guidevanes.
International journal on hydropower and dams.
volum 17 (2).
Vitenskapelig artikkel
-
Thapa, Bhola;
Dahlhaug, Ole Gunnar.
(2009)
Turbine Testing Laboratory and its Role in Hydropower.
Hydro Nepal: Journal of Water, Energy and Environment.
Vitenskapelig artikkel
-
Bajracharya, Tri ratna;
Acharya, B.;
Joshi, C.B.;
Saini, R.P.;
Dahlhaug, Ole Gunnar.
(2008)
Sand erosion of Pelton turbine nozzles and buckets: A case study of Chilime Hydropower Plant.
Wear.
volum 264 (3-4).
Vitenskapelig artikkel
-
Bajracharya, Tri ratna;
Joshi, C.B.;
Saini, R.P.;
Dahlhaug, Ole Gunnar.
(2006)
Correlation between sand led erosion of Pelton buckets and efficiency losses in high head hydropower schemes.
Journal of the institute of engineering.
volum 6 (1).
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Brekke, Hermod.
(2003)
Innovations in Turbine Design and Generator Condition Assesment.
Hydro Review Worldwide.
volum II (number 4, september).
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar.
(2002)
Utvikling av tidevannsturbin : prototype på 50 meters dyp i Kvalsundet.
Xergi.
volum 42 (4).
Populærvitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Martinsen, Anna Louise.
(2002)
Nasjonalt kontroll-laboratorium for små turbiner.
Xergi.
volum 42 (4).
Populærvitenskapelig artikkel
-
Knudsen, Sverre D;
Dahlhaug, Ole Gunnar;
Kjeldsen, Morten;
Børresen, Bjarne.
(2002)
Turbomachinery Calculations at highly off-design conditions.
International Journal of Applied Mechanics and Engineering.
volum 7 (1).
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Brekke, Hermod.
(2000)
HIGH TECNOLOGY VERSUS LOW COSTS FOR SMALL HYDRO FRANCIS TURBINES.
SMALL HYDRO 2000, Conference Proceedings, 8-12 May 2000.
Vitenskapelig artikkel
-
Dahlhaug, Ole Gunnar;
Skåre, Per Egil;
Børresen, Bjarne.
(2000)
CFD-CALCULATION OF SWIRLFLOW IN A CONICAL DIFFUSER AND BEND.
IAHR Symposium, Hydraulic Machinery and Systems. Conference Proceedings.
Vitenskapelig artikkel
Del av bok/rapport
-
Faudot, Celine;
Dahlhaug, Ole Gunnar.
(2011)
Tidal Turbine Blades: Design and Dynamic Loads Estimation Using CFD and Blade Element Momentum Theory (OMAE2011-49740).
30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. V.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2011)
A Conceptual Design Method for Parametric Study of Blades for Offshore Wind Turbines (OMAE2011-49743).
30th International Conference on Ocean, Offshore and Arctic Engineering (OMAE2011) - Vol. V.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
-
Frøyd, Lars;
Dahlhaug, Ole Gunnar.
(2011)
Rotor Design for a 10 MW Offshore Wind Turbine.
Proceedings of the Twenty-First (2011) International Offshore and Polar Engineering Conference.
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Rapport
-
Siemonsmeier, Marius;
Baumanns, Philipp;
van Bracht, Niklas;
Schönefeld, Maik;
Schönbauer, Andrea;
Moser, Albert;
Dahlhaug, Ole Gunnar;
Heidenreich, Sara.
(2018)
Hydropower Providing Flexibility for a Renewable Energy System: Three European Energy Scenarios.
2018.
Rapport
-
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Ramdal, Jørgen;
Brandåstrø, Bård Aslak.
(2007)
Tokke model test 2006-2007 NTNU reference runner.
2007.
Rapport
-
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Ramdal, Jørgen;
Brandåstrø, Bård Aslak.
(2007)
Tokke model test 2006-2007 VA-Tech runner.
2007.
Rapport
-
Francke, Håkon Hjort;
Dahlhaug, Ole Gunnar;
Storli, Pål-Tore Selbo;
Ramdal, Jørgen;
Kobro, Einar.
(2007)
Saurdal pumpekraftverk - Virkningsgrads- og falltapsmålinger.
2007.
Rapport
-
Skåre, Per Egil;
Dahlhaug, Ole Gunnar.
(2006)
Tapsanalyse og Skalaeffekt.
2006.
Rapport
-
Skåre, Per Egil;
Dahlhaug, Ole Gunnar;
Kobro, Einar.
(2006)
Sandslitasje i Pelton løpehjul.
2006.
Rapport
-
Dahlhaug, Ole Gunnar;
Støle, Haakon;
Pradhan, Pratik;
Joshi, Pabitra;
Bishwakarma, Meg.
(2005)
Sediment and efficiency measurement at Khimti I hydropower plant - Monsoon 2004.
2005.
Rapport
-
Dahlhaug, Ole Gunnar;
Pratik, Pradhan.
(2004)
Efficiency measurements at Andi Khola Hydropower Plant.
2004.
Rapport
-
Dahlhaug, Ole Gunnar;
Støle, Haakon;
Pradhan, Pratik;
Joshi, Pabitra;
Bishwakarma, Meg.
(2004)
Sediment and efficiency measurements at Jhimruk Hydropower Plant - Monsoon 2003.
2004.
Rapport
-
Dahlhaug, Ole Gunnar;
Brandåstrø, Bård Aslak.
(2002)
Virkningsgrad- og falltapsmåling ved Breivikbotn Kraftverk.
2002.
Rapport
-
Dahlhaug, Ole Gunnar;
Brandåstrø, Bård Aslak.
(2002)
Virkningsgrad- og falltapsmålinger ved Øvre Porsa Kraftverk.
2002.
Rapport
-
Dahlhaug, Ole Gunnar;
Nielsen, Torbjørn Kristian.
(2002)
Status for mini- og mikrokraftverk i Norge.
2002.
Rapport
-
Martinsen, Anna Louise;
Dahlhaug, Ole Gunnar.
(2002)
Miljøtilpasset el-kraftproduksjon ved små vannkraftverk i distrikts-Norge.
2002.
Rapport
-
Dahlhaug, Ole Gunnar.
(1998)
A study of swirl flow in draft tubes.
1998.
Doktorgradsavhandling
-
Dahlhaug, Ole Gunnar.
(1998)
Termodynamisk virkningsgradsmåling for lave fallhøyder.
1998.
Rapport
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Dahlhaug, Ole Gunnar;
Vekve, Thomas.
(1996)
LDV-measurements in circular sections.
1996.
Rapport
Undervisning
Emner
- EP8407 - Høytrykks vannkraftmaskiner
- TEP4195 - Turbomaskiner
- EP8406 - Frekvens- og effektregulering av vannkraftverk
- TEP4906 - Bærekraftige energisystemer, masteroppgave
- TEP4175 - Design av en vindturbin
- FENT2321 - Vindenergi og design av vindturbin
- TEP4200 - Konstruksjon, drift og vedlikehold av hydrauliske strømningsmaskiner
- BA8510 - Falltapsanalyser vanntunneler. Hydraulikk, sprengningsteknikk og økonomi
- TEP4521 - Bærekraftige energisystemer, fordypningsprosjekt
- EP8411 - Vannkraftverk; utvalgte tverrfaglige tema
- SKOLE6622 - Teknologi og forskningslære - Modul III Vindturbiner og interessekonflikter
- TEP4506 - Bærekraftige energisystemer, fordypningsemne
Formidling
2022
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Faglig foredragHarby, Atle; Dahlhaug, Ole Gunnar. (2022) Videreutvikling av vannkraften. Møte mellom NTNU/SINTEF og Energikommisjonen . NTNU og SINTEF; Trondheim. 2022-06-15 - 2022-06-15.
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Vitenskapelig foredragHultgreen, Liv Randi; Dahlhaug, Ole Gunnar. (2022) Growing x-disciplinary teamwork across established organizations and silo mentalities. Interdisciplinary teamwork skills for the 21st century . NTNU; Trondheim, Norway. 2022-06-16 - 2022-06-17.
2021
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Vitenskapelig foredragSolemslie, Bjørn Winther; Sigurdsson, Bjarki; Dahlhaug, Ole Gunnar; Tengs, Erik Os. (2021) Modal Testing of the Francis-99 Runner. 30th IAHR Symposium on Hydraulic Machinery and System ; 2021-03-22 - 2021-03-25.
2019
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Vitenskapelig foredragVereide, Kaspar; Lia, Leif; Dahlhaug, Ole Gunnar; Mo, Birger; Nysveen, Arne; Forseth, Torbjørn. (2019) Research on Extreme Upgrading of Existing Hydropower Systems. Hydro2019 . AquaMedia; Porto. 2019-10-14 - 2019-10-16.
2018
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Vitenskapelig foredragAgnalt, Einar; Solemslie, Bjørn Winther; Dahlhaug, Ole Gunnar. (2018) Onboard measurements of pressure pulsations in a high head Francis model runner. 29th Symposium on Hydraulic Machinery and Systems . Turbomachinery Society of Japan; Doshisha University, Kyoto. 2018-09-16 - 2018-09-21.
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Vitenskapelig foredragBergan, Carl Werdelin; Tengs, Erik Os; Solemslie, Bjørn Winther; Dahlhaug, Ole Gunnar. (2018) An Experimental Investigation of the Hydroynamic Damping of Vibrating Hydrofoils. 29th Symposium on Hydraulic Machinery and Systems . Turbomachinery Society of Japan; Doshisha University, Kyoto. 2018-09-16 - 2018-09-21.
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Faglig foredragDahlhaug, Ole Gunnar. (2018) Hydropower’s unique flexibility. Current Research in Hydraulic Turbines (CRHT-VIII-2018) . Kathmandu University; Kathmandu University. 2018-03-20 - 2018-03-20.
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Vitenskapelig foredragDahlhaug, Ole Gunnar. (2018) Model test of hydro turbines. Advancement in turbine and hydropower technology . International Centre for Hydropower, ICH; Kathmandu University. 2018-03-21 - 2018-03-21.
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Populærvitenskapelig foredragDahlhaug, Ole Gunnar; Holst, Martin a.; Fjærvold, Kjell-Tore. (2018) Høytrykks Francishjul som ikke sprekker. Produksjonsteknisk Konferanse, PTK 2018 . Energi Norge; Trondheim. 2018-03-05 - 2018-03-07.
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Vitenskapelig foredragIliev, Igor; Trivedi, Chirag; Agnalt, Einar; Dahlhaug, Ole Gunnar. (2018) Variable-speed operation and pressure pulsations in a Francis turbine and a pump-turbine. Symposium on Hydraulic Machinery and Systems, IAHR-2018 . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
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Vitenskapelig foredragSelvig, M. J.; Dahlhaug, Ole Gunnar; Trivedi, Chirag. (2018) Pressure pulsations in high head Francis turbines. Current Research in Hydraulic Turbines . Kathmandu University; Kathmandu. 2018-03-20 - 2018-03-20.
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Faglig foredragSilva, Ana T.; Dahlhaug, Ole Gunnar. (2018) Fish and turbines – same, same but different?. Fagdag for Forskere i HydroCen . NINA; NINA-huset. 2018-10-24 - 2018-10-24.
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Vitenskapelig foredragSolemslie, Bjørn Winther; Trivedi, Chirag; Agnalt, Einar; Dahlhaug, Ole Gunnar. (2018) Pressure Pulsations and Fatigue Loads in High Head Francis Turbines. 29th Symposium on Hydraulic Machinery and Systems . Turbomachinery Society of Japan; Doshisha University, Kyoto. 2018-09-16 - 2018-09-21.
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Vitenskapelig foredragTrivedi, Chirag; Agnalt, Einar; Dahlhaug, Ole Gunnar; Brandåstrø, Bård Aslak. (2018) Signature analysis of characteristic frequencies in a Francis turbine. Symposium on Hydraulic Machinery and Systems, IAHR-2018 . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
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Vitenskapelig foredragVolent, Eirik; Dahlhaug, Ole Gunnar; Tengs, Erik Os. (2018) Study of flow structure in erosion prone complex geometries. 29th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Kyoto. 2018-09-16 - 2018-09-21.
2017
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Vitenskapelig foredragLeonhardsen, Sondre; Trivedi, Chirag; Dahlhaug, Ole Gunnar. (2017) Numerical Investigation of Flow Field subject to Vibrating structure. International Symposium on Current Research in Hydraulic Turbines . Kathmandu University; Dhulikhel, Nepal. 2017-04-04 - 2017-04-04.
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Faglig foredragNysveen, Arne; Dahlhaug, Ole Gunnar. (2017) Bruk av variabelt turtall i norske kraftverk. Elektrisk utrustning og nettintegrasjon Turbinteknologi. Produksjonsteknisk konferanse (PTK 2017) . Energi Norge; Stavanger. 2017-03-06 - 2017-03-08.
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Populærvitenskapelig foredragSolemslie, Bjørn Winther; Dahlhaug, Ole Gunnar; Dagsvik, Helene Njølstad. (2017) Pågående forskningsaktivitet ved Vannkraftlaboratoriet. Peltonturbiner, Pumpeturbiner, Francisturbiner og andre eksterne oppdrag. Bransjebesøk på Vannkraftlaboratoriet ; 2017-12-08 - 2017-12-08.
2016
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Vitenskapelig foredragBergan, Carl Werdelin; Goyal, Rahul; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2016) Steady velocity and pressure measurements of a high-head Francis model turbine. 28th IAHR symposium on Hydraulic Machinery and Systems ; Grenoble. 2016-07-04 - 2016-07-08.
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Vitenskapelig foredragDahlhaug, Ole Gunnar. (2016) Development of global hydropower, the Norwegian perspective. 6th International symposium on Current Research in Hydraulic Turbines . Kathmandu University; Dhulikhel, Nepal. 2016-03-14 - 2016-03-14.
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Vitenskapelig foredragSolemslie, Bjørn Winther; Dahlhaug, Ole Gunnar. (2016) A reference Pelton turbine - High speed visualization in the rotating frame. 28th IAHR symposium on Hydraulic Machinery and Systems ; Grenoble. 2016-07-04 - 2016-07-08.
2014
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IntervjuBazilchuk, Nancy Reney; Tomasgard, Asgeir; Müller, Daniel Beat; Hertwich, Edgar G.; Dahlhaug, Ole Gunnar; Quale, Sverre; Undeland, Tore Marvin. (2014) Her er klimaforskernes råd. forskning.no [Internett]. 2014-04-13.
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Vitenskapelig foredragBergan, Carl Werdelin; Amiri, Kaveh; Cervantes, Michel; Dahlhaug, Ole Gunnar. (2014) Preliminary Measurements of the Radial Velocity in the Francis-99 Draft Tube Cone. Francis-99 Workshop 1: steady operation of Francis turbines . NTNU; Trondheim. 2014-12-15 - 2014-12-16.
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IntervjuSnøfugl, Ingvil; Storli, Pål-Tore Selbo; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Lia, Leif. (2014) Nytt vannkraftsenter skal lokke ungdom vekk fra oljebransjen. Teknisk Ukeblad nettavis [Internett]. 2014-02-10.
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Vitenskapelig foredragSolemslie, Bjørn Winther; Dahlhaug, Ole Gunnar. (2014) A reference pelton turbine - design and efficiency measurements. 27th IAHR Symposium on Hydraulic Machinery and Systems . Organizing Committee of the 27th IAHR Symposium; Montreal. 2014-09-22 - 2014-09-26.
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Vitenskapelig foredragSundström, Joel; Amiri, Kaveh; Bergan, Carl Werdelin; Cervantes, Michel; Dahlhaug, Ole Gunnar. (2014) LDA measurements in the Francis-99 draft tube cone. 27th IAHR Symposium on Hydraulic Machinery and Systems, IAHR . IAHR; Montreal. 2014-09-22 - 2014-09-26.
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IntervjuTomasgard, Asgeir; Müller, Daniel Beat; Hertwich, Edgar G.; Dahlhaug, Ole Gunnar; Quale, Sverre; Undeland, Tore Marvin. (2014) Her er klimaforskernes råd. Gemini.no [Internett]. 2014-04-13.
2012
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Vitenskapelig foredragEltvik, Mette; Thapa, Biraj Singh; Dahlhaug, Ole Gunnar; Gjøsæter, Kristine. (2012) Numerical analysis of effect of design parameters and sediment erosion on a Francis runner. 4th International Conference on Water Resources and Renewable Energy Development in Asia . Hydropower & Dam; Chiang Mai. 2012-04-26 - 2012-04-27.
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Vitenskapelig foredragSolemslie, Bjørn Winther; Dahlhaug, Ole Gunnar. (2012) A Reference Pelton Turbine Design. 26th IAHR Symposium on Hydraulic Machinery and Systems . Department of Thermal Engineering, Tsinghua University; Beijing. 2012-10-19 - 2012-10-23.
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Vitenskapelig foredragSolemslie, Bjørn Winther; Dahlhaug, Ole Gunnar. (2012) A Reference Pelton Turbine Design. Technoport 2012 - Sharing Possibilities - RERC . Technoport; Trondheim. 2012-04-16 - 2012-04-18.
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Faglig foredragThapa, Bhola; Thapa, Biraj Singh; Dahlhaug, Ole Gunnar; Shrestha, Krishna Prasad. (2012) Accelerated testing for resistance to sand erosion in hydraulic turbines. Fourth International Conference on Water Resources and Renewable Energy Development in Asia . Hydropower & Dams; Chiang Mai. 2012-03-26 - 2012-03-27.
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Vitenskapelig foredragThapa, Biraj Singh; Dahlhaug, Ole Gunnar; Eltvik, Mette; Thapa, Bhola; Gjøsæter, Kristine. (2012) Design Optimization of Francis Runners for Sediment Handling. 4th International Conference on Water Resources and Renewable Energy Development in Asia . Hydropower & Dam; Chiang Mai. 2012-04-26 - 2012-04-27.
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Vitenskapelig foredragThapa, Biraj Singh; Eltvik, Mette; Dahlhaug, Ole Gunnar; Thapa, Bhola; Gjøsæter, Kristine. (2012) Effects of turbine design parameters on sediment erosion of Francis runner. 2nd International Conference on the Developments in Renewable Energy Technology . ICDRET; Dhaka. 2012-01-05 - 2012-01-07.
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Vitenskapelig foredragThapa, Biraj Singh; Thapa, Bhola; Eltvik, Mette; Dahlhaug, Ole Gunnar; Gjøsæter, Kristine. (2012) Optimizing runner blade profile of Francis turbine to minimize sediment erosion. 26th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Beijing. 2012-08-19 - 2012-08-23.
2011
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Vitenskapelig foredragEltvik, Mette; Dahlhaug, Ole Gunnar; Neopane, Hari Prasad. (2011) Prediction of Sediment Erosion in Francis Turbines. Cavitation and Dynamic problems in Hydraulic Machinery and Systems . IAHR; Beograd. 2011-10-26 - 2011-10-28.
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Vitenskapelig foredragFrøyd, Lars; Dahlhaug, Ole Gunnar; Hansen, Morten Hartvig. (2011) Prediction of flutter speed on a 10 MW wind turbine. EWEA Offshore 2011 . European Wind Energy Association; Amsterdam. 2011-11-29 - 2011-12-01.
2010
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Populærvitenskapelig foredragDahlhaug, Ole Gunnar. (2010) Development of a horizontal axis tidal turbine. Innledning før forsvar av Lisensiatgrad for Emilia Lalander . Uppsala Universitet; Uppsala. 2010-01-29 - 2010-01-29.
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Populærvitenskapelig foredragDahlhaug, Ole Gunnar. (2010) Potential top-mass reduction by hydraulic transmission. Wind Power R&D seminar . SINTEF; Trondheim. 2010-01-21 - 2010-01-22.
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Populærvitenskapelig foredragDahlhaug, Ole Gunnar; Fjærvold, Kjell Tore. (2010) FoU ved Vannkraftlaboratoriet. Produksjonsteknisk Konferanse 2010 . Energi Norge; Gardemoen. 2010-03-08 - 2010-03-10.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Skåre, Per Egil. (2010) Sediment resistive Francis runner at Cahua Power Plant. Hydropower’10, 6th International Conference on Hydropower . International Centre for Hydropower, ICH; Trømsø. 2010-02-01 - 2010-02-03.
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Vitenskapelig foredragJonsson, Pontus P.; Ramdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2010) The Pressure-Time measurements project at LTU and NTNU. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology / IGHEM; Roorkee. 2010-10-21 - 2010-10-23.
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Vitenskapelig foredragKobro, Einar; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2010) Data Analysis From Onboard Francis Model Runner Pressure Measurements. The 13th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery . University of Tokyo, Japan; Honolulu, Hawaii. 2010-04-04 - 2010-04-09.
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Vitenskapelig foredragNeopane, Hari Prasad; Dahlhaug, Ole Gunnar; Eltvik, Mette. (2010) Numerical prediction of particle shape factor effect on sediment erosion in Francis turbine blades. Hydropower’10, 6th International Conference on Hydropower . International Centre for Hydropower, ICH; Tromsø. 2010-02-01 - 2010-02-03.
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Vitenskapelig foredragRamdal, Jørgen; Jonsson, Pontus P.; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Cervantes, Michel. (2010) Uncertainties for Pressure-Time Efficiency Measurements. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology; Roorkee. 2010-10-21 - 2010-10-23.
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Vitenskapelig foredragRamdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2010) UNCERTAINTY AND PERFORMANCE OF A LOW HEAD THERMODYNAMIC MEASUREMENT. International Group for Hydraulic Efficiency Measurements . Indian Institute of Technology / IGHEM; Roorkee. 2010-10-21 - 2010-10-23.
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Vitenskapelig foredragThapa, Bhola; Dahlhaug, Ole Gunnar; Shrestha, Raju. (2010) Turbine laboratory at Kathmandu University for development of alternative energy in Nepal. Hydropower’10, 6th International Conference on Hydropower . International Centre for Hydropower, ICH; Tromsø. 2010-02-01 - 2010-02-03.
2009
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Vitenskapelig foredragDahlhaug, Ole Gunnar. (2009) Development of a sediment resistive Francis runner. Hydro 2009 . The International Journal on Hydropower & Dams; Lyon. 2009-10-26 - 2009-10-28.
2008
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Vitenskapelig foredragKobro, Einar; Dahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian. (2008) Onboard Pressure Measurement In Francis Model Runner Blades. 24th IAHR Symposium on Hydraulic Machinery and Systems . IAHR; Foz do Iguazzu. 2008-10-27 - 2008-10-31.
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Vitenskapelig foredragRamdal, Jørgen; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2008) Decreasing uncertainty in thermodynamic measurement. IAHR Symposium on Hydraulic Machinery and systems . IAHR; Foz do Iguassu, Brazil. 2008-10-27 - 2008-10-31.
2007
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Populærvitenskapelig foredragDahlhaug, Ole Gunnar. (2007) Hydraulisk Gir til Vindturbiner. Vindkraft FoU Seminar - Vinn eller Forsvinn! . SINTEF Energiforskning; Trondheim. 2007-01-25 - 2007-01-26.
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Vitenskapelig foredragNeopane, Hari Prasad; Dahlhaug, Ole Gunnar; Thapa, Bhola. (2007) Alternative design of a francis turbine for sand laden waters. International Conference on small hydropower . International Centre for Hydropower, ICH; Kandy. 2007-10-22 - 2007-10-24.
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Vitenskapelig foredragThapa, Bhola; Chaudhary, Pralhad; Dahlhaug, Ole Gunnar; Upadhyay, Piyusch. (2007) Study of combined effect of sand erosion and cavitation in hydraulic turbines. International conference on small hydropower . International Centre for Hydropower, ICH; Kandy. 2007-10-22 - 2007-10-24.
2006
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Vitenskapelig foredragAntonsen, Øyvind; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2006) Experimental and Theoretical Investigations of the Flow Field at the Inlet of a Francis Runner. HydroVision 2006 . HCI-Publication; Portland, Oregon. 2006-08-01 - 2006-08-04.
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Vitenskapelig foredragAntonsen, Øyvind; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar; Billdal, Jan Tore. (2006) Pressure pulses in Francis Turbines vs. guide vane design. 23rd IAHR Symposium on Hydraulic Machinery and Systems . The Int. Association of Hydraulic Engineering and Research; Yokohama. 2006-10-17 - 2006-10-21.
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Vitenskapelig foredragBajracharya, Tri ratna; Joshi, C.B.; Dahlhaug, Ole Gunnar; Saini, R.P.. (2006) Analysis of sand particles led damage of Pelton Turbines in Nepal. 14th Seminar on Hydropower Plants . Institute for Waterpower and pumps, University of Vienna; Wien. 2006-10-10 - 2006-10-12.
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Vitenskapelig foredragBajracharya, Tri ratna; Joshi, C.B.; Thapa, Bhola; Saini, R.P.; Dahlhaug, Ole Gunnar. (2006) Correlation study on sand led erosion of buckets and efficiency losses in high head power plants. Renewable energy technology for rural development . Institute of Engineering, Tribhuvan University; Kathmandu. 2006-10-12 - 2006-10-14.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Kobro, Einar; Skåre, Per Egil; Nielsen, Torbjørn Kristian; Thapa, Bhola. (2006) Efficiency loss in Pelton buckets due to sediment erosion. 23rd IAHR Symposium on Hydraulic Machinery and Systems . The Int. Association of Hydraulic Engineering and Research; Yokohama. 2006-10-17 - 2006-10-21.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Nielsen, Torbjørn Kristian; Brandåstrø, Bård Aslak; Francke, Håkon Hjort; Hulaas, Harald. (2006) Comparison between pressure-time and thermodynamic efficiency measurements on a low head turbine. IGHEM 2006 . The International Group for Hydraulic Efficiency Measurement; Portland, Oregon. 2006-07-30 - 2006-08-01.
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Vitenskapelig foredragHulaas, Harald; Dahlhaug, Ole Gunnar. (2006) Uncertainty analysis of Pressure-Time measurement. IGHEM 2006 . The International Group for Hydraulic Efficiency Measurement; Portland, Oregon. 2006-07-30 - 2006-08-01.
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Vitenskapelig foredragKjeldsen, Morten; Olsen, Knut Magne; Nielsen, Torbjørn Kristian; Dahlhaug, Ole Gunnar. (2006) Water injection for the mitigation of draft tube pressure pulsations. IAHR Int. Meeting on Cavitation and Dynamic Problems . IAHR; Barcelona. 2006-06-28 - 2006-06-30.
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Vitenskapelig foredragNielsen, Torbjørn Kristian; Røyrvik, Johnny; Ramdal, Jørgen; Dahlhaug, Ole Gunnar. (2006) Propeller turbine with two contra-rotating impellers and built in generators. 23th IAHR Symposium . IAHR; Yokohama. 2006-10-17 - 2006-10-20.
2005
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola; Nielsen, Torbjørn Kristian; Ruud, Jonas Jessen. (2005) Thermodynamic efficiency measurement of Khimti Hydropower Plant and assessment of sand erosion on turbine components. Hydropwer �05, The Backbone of Sustainable Energy Supply. . International Center for Hydropower, ICH; Stavanger. 2005-05-23 - 2005-05-25.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola; Shrestha, Raju. (2005) Investigation of erosion resistance of turbine steels and coating materials. 6th International Conference on Development of Hydropower, a Major Source of Renewable Energy ; Kathmandu. 2005-05-23 - 2005-05-25.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola; Shrestha, Raju. (2005) Relation between surface roughness and erosion of hydraulic turbine components. India Hydro 2005 ; New Dehli. 2005-02-19 - 2005-02-21.
2004
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola. (2004) Sand erosion in a Francis turbine. A case study from Jhimruk power plant, Nepal. 22nd IAHR symposium on Hydraulic Machinery and Systems . IAHR; Stockholm. 2004-06-29 - 2004-07-02.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola; Shrestha, Raju. (2004) Sediments of Nepalese Rivers with respect to sand erosion in hydraulic turbine. Ninth International Symposium on River Sedimentation (9th ISRS) ; Yichang, Hubei Province. 2004-10-18 - 2004-10-21.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola; Shrestha, Raju; Kaphle, Krishna. (2004) Sediments of Nepalese rivers with respect to sand erosion in hydraulic turbines. Vitenskapelig konferanse . Internationlal symposium on river sedimentation; Yichang, Hubei province. 2004-10-18 - 2004-10-21.
2003
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Thapa, Bhola. (2003) Sand erosion in hydraulic turbines and wear rate measurement of turbine materials. Hydro Africa 2003 . ICH; Arusha. 2003-11-17 - 2003-11-19.
2002
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Vitenskapelig foredragBrekke, Hermod; Dahlhaug, Ole Gunnar. (2002) Development of small simplified Francis Turbines. HydroVision 2002 . [Mangler data]; Portland, Oregon USA. 2002-08-02.
2001
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Vitenskapelig foredragBrekke, Hermod; Dahlhaug, Ole Gunnar. (2001) Design of Mini and Micro Turbines Versus Large Turbines. Hydro 2001 . [Mangler data]; Riva del Garda, Italia. 2001-09-29.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Skåre, Per Egil. (2001) CFD-calculation of a draft tube flow. Proceedings of Turbine-99 - W2 The second ERCOFTAC Workshop on Draft Tube Flow . [Mangler data]; Älvkarleby, Sweden. 2001-06-20.
2000
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PosterDahlhaug, Ole Gunnar; Brekke, Hermod. (2000) Technical and political issues for Small Hydro in Norway. HydroVision 2000, Conference Proceedings, August 8-11 2000, . [Mangler data]; Charlotte, North Carolina, USA. 2000-08-11.
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Vitenskapelig foredragOkulov, Valery L.; Dahlhaug, Ole Gunnar; Andersson, Helge Ingolf. (2000) Changes in the axial symmetry of the velocity field and in the helical symmetry of the vorticity field downstream of a bend and a diffuser. 4th EUROMECH European Fluid Mechanics Conference . [Mangler data]; Eindhoven, 19-23 November 2000.
1999
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Skåre, Per Egil; Kjeldsen, Morten. (1999) CFD CALCULATION OF A DRAFT TUBE FLOW. Turbine -99 . [Mangler data]; Pojus, Sweden. 1999-06-23.
1998
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Vitenskapelig foredragBrekke, Hermod; Dahlhaug, Ole Gunnar. (1998) Loss analysis and measuring uncertainties of the thermodynamic method for different turbinde types. IGHEM 98, USA . [Mangler data]; Reno, USA.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Brekke, Hermod. (1998) A discussion on the influence of turbulent kinetic energy on hydraulic efficiency measurement. International Group for Hydraulic Efficiency Measurements, IGHEM, RENO '98 . [Mangler data]; Reno, Nevada, USA. 1998-07-28.
1996
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Vitenskapelig foredragDahlhaug, Ole Gunnar. (1996) SWIRL FLOW IN CONICAL DIFFUSERS. XVIII IAHR Sumposium on Hydraulic Machinery and Cavitation . [Mangler data]; Valencia, Spain. 1996-09-15.
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Vitenskapelig foredragDahlhaug, Ole Gunnar; Brekke, Hermod. (1996) Energy distribution at the draft tube outlet. IGHEM Seminar - Montreal '96 . [Mangler data]; Montreal, Canada. 1996-06-28.