Numerical simulation of the performance of a low-head prototype Kaplan turbine

Asian Working Group- IAHR's Symposium on Hydraulic Machinery and Systems

Chen, F.N.^1 ; Lei, H.M.^1 ; Ahn, S.H.^1 ; Fan, H.G.^1 ; Jiang, X.P.^2 ; Hu, J.W.^2 ; Zhang, J.^1 ; Luo, Y.Y.^1 ; Wang, Z.W.^1

State Key Laboratory of Hydroscience and Engineering, Department of Thermal Engineering, Tsinghua University, Beijing

100084, China^1

School of Mechanical Electronic and Information Engineering, China University of Mining and Technology(Beijing), Beijing

100083, China^2

关键词: Gravity forces;    Guide vane;    Head loss;    Internal flow characteristics;    Maximum Efficiency;    Numerical simulation method;    Opening degree;    Prototype kaplan turbines;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/163/1/012070/pdf
DOI  :  10.1088/1755-1315/163/1/012070

来源: IOP

【 摘 要 】

The opening degrees of guide vane and runner blade are adjustable for Kaplan units. Therefore, the prototype unit performance is evaluated by cam curves to ensure the maximum efficiency points at different runner blade or guide vane angles. In this paper, the numerical simulation method is used to obtain the cohesive curves. The gravity force term is not ignored in the calculation, of which the effects are analysed not only on prototype performances, but also on internal flow characteristics such as the streamlines around runner blades, the pressure distributions and the head losses of each part.