Optimization and analysis of efficiency for centrifugal pump with semiopen impeller

CHEN Songsong1, RUAN Yueguang2, RUAN Xiaodong1, ZOU Jun1， FU Xin1
(1. State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China;
2. Zhejiang Institute of Mechanical & Electrical Engineering, Hangzhou 310053, China)

Abstract: To improve the hydraulic efficiency of the centrifugal pump with semiopen impeller, the speed coefficient method was used to optimize the hydraulic efficiency. The kε turbulence model and standard wall function were applied to simulate the centrifugal pump. The effects of different clearances and numbers of vane on pump hydraulic efficiency were simulated and analyzed. It is showed that the efficiency of centrifugal pump has satisfactory result, while the clearances between volute and impeller is 0.5 mm, the number of vane is 6.
Key words: centrifugal pump; optimization design; speed coefficient method; computational fluid dynamics