Effects of blade inlet edge position on pressure pulsation in volute of a single blade centrifugal pump
CHEN Jianfang1,2, SHI Weidong3, ZHANG Desheng1, TAN Linwei3
1. Research Center of Fluid Machinery Engineering and Technology, Jiangsu University, Zhenjiang 212013, China;
2. College of Petroleum Engineering, Changzhou University, Changzhou 213164, China;
3. College of Mechanical Engineering, Nantong University, Nantong 226019, China
Abstract：To study the effect of blade inlet position on characteristics of single blade centrifugal pump,based on the standard k-ε turbulence model, steady numerical simulation for single blade centrifugal pumps with different blade inlet edge positions was first calculated, and the external characteristics were analyzed. The reliability of the numerical calculation results was verified through experiments. Then, unsteady numerical calculation was carried out to analyze the influence of blade inlet position on the pump pressure fluctuation characteristics based on the steady calculation results. The numerical calculation results show that the random pressure fluctuation in rest of the volute except the near tongue decreases, the periodic characteristics of the pressure fluctuation increase, and the amplitude of the pressure fluctuation coefficient and the main frequency pressure fluctuation increase with the increase of the extension of the blade inlet edge along the rear shroud or front shroud to the pump inlet, while the amplitude of the pressure fluctuation coefficient and the main frequency pressure fluctuation at the tongue both decrease first and then increase. Proper extension of the blade inlet edge can reduce the pressure fluctuation at the tongue.
陈建芳1,2，施卫东3，张德胜1，谭林伟3. 叶片进口边位置对单叶片离心泵蜗壳内压力脉动的影响[J]. 振动与冲击, 2021, 40(23): 239-246.
CHEN Jianfang1,2, SHI Weidong3, ZHANG Desheng1, TAN Linwei3. Effects of blade inlet edge position on pressure pulsation in volute of a single blade centrifugal pump. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(23): 239-246.
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