Abstract：To study the coupling flow filed of impellers with different vane wrap angles in the same volute,numerical simulations were performed for a sewage pump by using commercial software FLUENT 6.2.The Reynolds-averaged Navier-Stokes equations was discretized,solved with standard k-ε turbulence model and the SIMPLE algorithm in double coordinate system.The pressure and velocity distributions both in impeller and in volute were gained providing basis for the performance prediction,the hydraulic design and optimal design of a low specific speed sewage pump.The velocity distribution on the side of the impeller with 190° vane wrap angle is better than with other vane wrap angles,and the pressure distribution near the volute tongue of this impeller produces a certain obviously smaller high-pressure zone.Furthermore,the optimal scheme pump character gained experimentally was compared with simulating prediction.The results show that while other hydraulic geometrical parameters of a low specific speed sewage pump fixed,with the vane wrap angle adding,there exist significant differences of inner flow and a maximum value of pump efficiency.
曹卫东， 李跃，张晓娣. 低比转速污水泵叶片包角对水力性能的影响[J]. 排灌机械工程学报, 2009, 27(6): 362-366.
Cao Weidong,Li Yue,Zhang Xiaodi. Study on performance of low specific speed sewage pump with different vane wrap angles. Journal of Drainage and Irrigation Machinery Engin, 2009, 27(6): 362-366.
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