叶片进口边位置对单叶片离心泵蜗壳内压力脉动的影响

陈建芳1,2,施卫东3,张德胜1,谭林伟3

振动与冲击 ›› 2021, Vol. 40 ›› Issue (23) : 239-246.

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振动与冲击 ›› 2021, Vol. 40 ›› Issue (23) : 239-246.
论文

叶片进口边位置对单叶片离心泵蜗壳内压力脉动的影响

  • 陈建芳1,2,施卫东3,张德胜1,谭林伟3
作者信息 +

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
Author information +
文章历史 +

摘要

为了研究叶片进口边位置对单叶片离心泵性能的影响,本文基于标准k-ε湍流模型,对不同叶片进口边位置的单叶片离心泵首先进行了定常数值计算和外特性分析,并通过试验验证了数值计算结果的可靠性。然后以定常计算结果为基础进行了非定常数值计算,分析了叶片进口边位置对泵压力脉动特性的影响。数值计算结果表明:随着叶片进口边沿后盖板或前盖板向泵入口延伸量的增加,除隔舌附近外蜗壳内其余区域的随机压力脉动减弱,压力脉动周期性特征增强,压力脉动系数的幅值和主频压力脉动幅值增大;而隔舌处的压力脉动系数的幅值和主频压力脉动幅值均是先减小后增大,叶片进口边适当延伸可降低隔舌处的压力脉动。

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.

关键词

单叶片离心泵 / 叶片进口边位置 / 压力脉动特性 / 数值模拟

Key words

single blade centrifugal pump / blade inlet edge position / pressure fluctuation / numerical simulation

引用本文

导出引用
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[J]. Journal of Vibration and Shock, 2021, 40(23): 239-246

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