CFD analysis of a bulb turbine and validation with measurements from the BulbT project

27th IAHR Symposium on Hydraulic Machinery and Systems

Vu, T.C.^1 ; Gauthier, M.^1 ; Nennemann, B.^1 ; Wallimann, H.^2 ; Deschênes, C.^3

Andritz Hydro Ltd., 6100 Transcanadienne, Pointe Claire

QC

H9R 1B9, Canada^1

Andritz Hydro AG, Hardstrasse 319, Zürich

8021, Switzerland^2

Laval University, 1065 Avenue de la Médecine, Québec

QC

G1V 0A6, Canada^3

关键词: CFD analysis;    Flow behaviors;    Hysteresis phenomenon;    Numerical results;    Operating points;    Turbine efficiency;    Turbine performance;    Turbine power;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/22/2/022008/pdf
DOI  :  10.1088/1755-1315/22/2/022008

来源: IOP

【 摘 要 】

In the present paper both steady and unsteady CFD analysis were performed to investigate the flow behavior in a bulb turbine. A study was carried out to assess the effect of runner tip and hub gap size on the turbine performance. Also special attention was paid to the turbine power break off at full load condition as well as the hysteresis phenomena on the turbine efficiency curve occurring in the same region. The unsteady calculations were performed only for some operating points of interest near the power break off region. The numerical results were compared with experimental data from the BulbT project.