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
- (2019) Analytical Evaluation of Head and Flow Rate Off-Design Characteristics for Pump as Turbine Application. Journal of Fluids Engineering - Trancactions of The ASME. vol. 141 (5).
- (2019) The elastic property of water and penstock's effect on the governor stability. IOP Conference Series: Earth and Environmental Science (EES). vol. 240 (5).
- (2019) Investigation of fluid transients in a penstock attached to a Francis turbine rig using seismic interferometry. Journal of Physics: Conference Series. vol. 1266 (1).
- (2019) Transient hydraulic calculations with a linear turbine model derived from a nonlinear synthetic model. IOP Conference Series: Earth and Environmental Science (EES). vol. 240 (5).
- (2019) Francis-99 Workshop 3: Fluid structure interaction. Journal of Physics: Conference Series. vol. 1296 (1).
- (2019) Influence of draft tube water injection system on cavitation behaviour in a full-scale Francis turbine with visual access. IOP Conference Series: Earth and Environmental Science (EES). vol. 240.
- (2018) Transient characteristics during the closure of guide vanes in a pump-turbine in pump mode. Renewable Energy. vol. 118.
- (2018) Simulation and Discussion of Models for Hydraulic Francis Turbine Simulations. IFAC-PapersOnLine. vol. 51 (2).
- (2018) Fast transition from pump to turbine mode of operation. International Journal of Fluid Machinery and Systems. vol. 11 (3).
- (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 Environmental Science (EES). 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).