Bakgrunn og aktiviteter
Om Torbjørn K. Nielsen
Jeg er professor ved Institutt for energi og prosessteknikk, nærmere bestemt leder på Vannkraftlaboratoriet. Aktivitetene ved Vannkraftlaboratoriet innebærer forskning innen hydrauliske maskiner, spesielt vannkraftturbiner, men også pumper og annet hydraulisk maskineri. Min spesielle interesse ligger i samspillet mellom vannkraftturbiner og systemet, både på hydraulisk side og elektrisk.
På Vannkraftlaboratoriet har vi for tiden 12 Masterstudenter og 6 PhD studenter. Mye av min tid går med til veiledning av disse. Oppgavene spenner over design av maskiner, trykkpulsasjoner, kavitasjon, systemanalyse, både for turbiner og pumper mm.
Andre verv: Leder for Teknisk kommite 4 i NEK, medlem av TC4 i den internasjonale standardiserinsorganisasjonen IEC, medlem av IAHR spesielt tilknyttet "Hydraulic Machinery and Systems".
Vitenskapelig, faglig og kunstnerisk arbeid
Et utvalg av nyere tidsskriftspublikasjoner, kunstneriske produksjoner, bok, inklusiv bokdeler og rapport-del. Se alle publikasjoner i databasen
Tidsskriftspublikasjoner
- (2018) Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations. IFAC-PapersOnLine. vol. 51 (2).
- (2017) Blade passage modeling strategy for hydraulic turbine. International Journal of Fluid Machinery and Systems. vol. 10 (4).
- (2017) Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine. International Journal of Fluid Machinery and Systems. vol. 10 (2).
- (2017) The Effect of Surge Tank Throttling on Governor Stability, Power Control, and Hydraulic Transients in Hydropower Plants. IEEE transactions on energy conversion. vol. 32 (1).
- (2016) Hysteresis characteristic in the hump region of a pump-turbine model. Energies. vol. 9 (8).
- (2016) Influence of guide vane setting in pump mode on performance characteristics of a pump-turbine. IOP Conference Series: Earth and Environment. vol. 49 (4).
- (2016) Measuring the dynamic characteristics of a low specific speed pump-Turbine model. Energies. vol. 9 (3).
- (2015) Detection of Draft Tube Surge and Erosive Blade Cavitation in a Full-Scale Francis Turbine. Journal of Fluids Engineering - Trancactions of The ASME. vol. 137 (1).
- (2015) Simulation model for Francis and Reversible Pump Turbines. International Journal of Fluid Machinery and Systems. vol. 8 (3).
- (2015) Hydraulic scale modelling and thermodynamics of mass oscillations in closed surge tanks. Journal of Hydraulic Research. vol. 53 (4).
- (2015) Thermodynamic Behaviour and Heat Transfer in Closed Surge Tanks for Hydropower Plants. Journal of Hydraulic Engineering. vol. 141 (6).
- (2014) A numerical investigation of flow profile and performance of a low cost Crossflow turbine. The International Journal of Energy and Environment. vol. 5 (3).
- (2014) A technical discussion on microhydropower technology and its turbines. Renewable & Sustainable Energy Reviews. vol. 35.
- (2014) Measurements and simulations of turbines on common grid. IOP Conference Series: Earth and Environment. vol. 22 (4).
- (2014) Unstable behaviour of RPT when testing turbine characteristics in the laboratory. IOP Conference Series: Earth and Environment. vol. 22.
- (2014) Dynamic load on a Francis turbine runner from simulations based on measurements. IOP Conference Series: Earth and Environment. vol. 22 (3).
- (2013) Study on the leakage flow through a clearance gap between two stationary walls. IOP Conference Series: Earth and Environment. vol. 15.
- (2012) Dependency on Runner Geometry for Reversible-Pump Turbine Characteristics in Turbine Mode of Operation. Journal of Fluids Engineering - Trancactions of The ASME. vol. 134 (12).
- (2012) Stability Limits of Reversible-Pump Turbines in Turbine Mode of Operation and Measurements of Unstable Characteristics. Journal of Fluids Engineering - Trancactions of The ASME. vol. 134 (11).
- (2011) Transient Friction in Pressurized Pipes. I: Investigation of Zielke's Model. Journal of Hydraulic Engineering. vol. 137 (5).