Effect of different blade surface profileson performance of centrifugal pump
                                          TAO Ren he1, ZHANG Yong1, CHEN Xu lai1,2, GUO Jia1, WANG Can fei1, WU Fei1
(1.Zhejiang Institute of Mechanical & Electrical Engineering Co. Ltd., Hangzhou 310051 China；2.Zhejiang Testing & Inspection Institute for Mechanical and Electrical Products Quality, Hangzhou 310051 China)

Abstract: In order to research on effect of different Blade Surface Profiles on Performance and Flow field of centrifugal pump. A common centrifugal pump is analyzed. Two kinds of impeller models with the same design parameters and different Blade Surface Profiles were designed based on Cfturbo software. The standard k-ε turbulence model were applied to simulatecharacteristics and The RNGk-ε turbulence model, homogeneous multiphase model and Rayleigh Plesset equation were applied to simulate cavitation characteristics of two centrifugal pump models. The flow field characteristics and the hydraulic performance were predicted and compared with experimental results. The result indicated that At the same flow rate，the centrifugal pump of the impeller of 3 D free surface blades was 0.45 meter smaller than he centrifugal pump of the impeller of ruled surface blades and the same NPSHR.The impeller of the freeform blades can be replaced by optimizing the impeller of ruledsurface blades in order to reduce the cost of production.

Key words: blade; surface profiles; external characteristic; numerical simulations