Experimental research on flow field in the draft tube of pump turbines based on LDV

29th IAHR Symposium on Hydraulic Machinery and Systems

Liu, D.M.^1^2 ; Zhao, Y.Z.^2 ; Zuo, Z.G.^1

State Key Laboratory of Hydro Science and Hydraulic Engineering, Beijing

100084, China^1

Research and Development Center of Dongfang Electric Machinery CO. LTD, Sichuan Province, Deyang, 618000, China^2

关键词: Axial velocity;    Circumferential velocity;    Experimental research;    Extended operations;    High-efficiency;    Hydraulic machines;    Laser Doppler Velocimetry;    Pump storage power plants;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/7/072030/pdf
DOI  :  10.1088/1755-1315/240/7/072030

来源: IOP

【 摘 要 】

A large number of pumped storage power plants will be put into operation in China. The current development of modern pump storage power plants aims towards a higher flexibility and stability in operation, and an extended operation range of the hydraulic machine. These projects have a large number of problems. For problems of the turbine units, the optimization of pump turbine is very crucial to ensure the unit's high efficiency and stability. The velocity distribution on the runner outlet is very important to optimize the pump turbine. In this paper, the velocity on runner outlet was tested by LDV (Laser Doppler Velocimetry). The axial velocity and circumferential velocity on runner outlet were tested at different working points by LDV. The velocity distribution can provide important reference for the runner design.