关键词: 开式叶轮, 离心泵, 试验研究, 数值模拟, 冲击吸收功, 晶界, 韧脆转变, 石墨球, 铁素体球墨铸铁, 位错密度

Abstract: The clumpy gridding technic, Reynolds average N-S equation and application S-A turbulence model are adopted to do the numerical simulation for inner flow field of the open straight-leave high-speed centrifugal pump impeller, The open high-speed centrifugal pump is experimentation studed. After compared the result of the numerical value simulation with that of the experimentation. The numerical simulation can preferably simulate the inner flow field of the centrifugal pump impeller, is got. The reasons inflecting the inner flow field and the outer characteristic of the centrifugal pump impeller, are summarized. This study brought valuable references in optimizing designing and in improving the efficiency of pumps.

Key words: Centrifugal pump, Experiment study, Open impeller Numerical simulation, Dislocation distribution, Ductile to brittle transition, Grain boundary, Graphite nodules, Impact absorbed energy, Ferrite cast iron