Abstract：The hydraulic design of an original model of the WP7 diesel engine cooling pump was optimized by solving the timeaveraged Navier-Stokes equations, the standard k-ε twoequation turbulence model and the multiphase flow model with CFD codeCFX. A structured hexahedral mesh has been generated for improving accuracy of numerical simulation. A comparison of fluid static pressure, turbulent kinetic energy and vapor volume fraction contours, hydraulic and suction performance was made between the original pump and optimized one. It was shown that the optimized pump not only exhibits obviously low turbulent kinetic energy and vapor volume fraction at the impeller entrance, but also has a better hydraulic and suction performance compared with the original impeller. The impeller with the blade leading edge that was properly extended into the impeller eye and with a certain inclined angle with respect to the pump shaft has an improved hydraulic and suction performance due to reduced shock losses at the leading ledges and more uniformed flow pattern at the impeller entrance, causing the head was raised by around 3.16 m and NPSHC was declined as low as about 1.10 m. Even thought the performance predicted by CFD has a certain difference from the experimental one,the variation tendency of them is consistent with each other.
施卫东, 裴冰, 陆伟刚, 王川, 李伟. 基于CFD的汽车水泵优化设计[J]. 排灌机械工程学报, 2013, 31(1): 15-19.
SHI Wei-Dong, PEI Bing, LU Wei-Gang, WANG Chuan, LI Wei. Optimization of automobile pump based on CFD. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(1): 15-19.
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