Influence of impeller vane arrangement on efficiency performance and pressure fluctuations of a double-suction centrifugal pump

29th IAHR Symposium on Hydraulic Machinery and Systems

Song, Yu^1^2 ; Luo, Yongyao^3

Institute of Nuclear and New Efficiency Technology, Tsinghua University, Beijing

100084, China^1

Collaborative Innovation Center of Advanced Nuclear Efficiency Technology, Key Laboratory of Advanced Reactor Engineering and Safety, Ministry of Education of China, China^2

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

100084, China^3

关键词: Double-suction centrifugal pumps;    Monitoring locations;    Numerical results;    Pressure fluctuation;    Pressure variations;    Pump efficiency;    Relative errors;    Rotor-stator interactions;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/3/032015/pdf
DOI  :  10.1088/1755-1315/240/3/032015

来源: IOP

【 摘 要 】

Two double-entry impellers with inline-vane and staggered-vane arrangements are designed, and then the influence of impeller-vane arrangement on efficiency performance and pressure fluctuations of a double-suction centrifugal pump is investigated. The reliability and accuracy of the numerical method is validated by comparing the experimental and numerical results of pump efficiency performance. The relative error of efficiency at four different flow rates is below 3%. The efficiency performance for different vane arrangements are compared. Eighteen monitoring locations covering important pump regions in impeller and volute are set to obtain the details of pressure fluctuations. The results show that the pressure fluctuations in the volute is greatly reduced for staggered-vane arrangement. The pressure distributions at middle-span plane of the pump show smaller pressure variation for staggered-vane impeller. The overall investigation reveals a weaker rotor-stator interaction for the staggered-vane impeller.