旋流泵内部非定常压力脉动分析

沈姗姗, 薛明瑞, 周豪

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液压与气动 ›› 2020, Vol. 0 ›› Issue (06) : 97-102. DOI: 10.11832/j.issn.1000-4858.2020.06.015
理论研究

旋流泵内部非定常压力脉动分析

  • 沈姗姗, 薛明瑞, 周豪
作者信息 +

Analysis on Unsteady Pressure Pulsation of Inside Vortex Pump

  • SHEN Shan-shan, XUE Ming-rui, ZHOU Hao
Author information +
History +

摘要

为了深入分析旋流内部流场的压力脉动特性,建立旋流泵数值计算模型,基于标准k-ε湍流模型,开展旋流泵内部流动结构的非定常计算,分析旋流泵进口、出口及压水室的监测点的压力脉动情况,探讨各处压力时域与频域图变化规律,并对脉动特性进行试验验证。结果表明:不同工况下旋流泵压力波动呈现明显的周期性变化;叶轮与隔舌处的干涉作用是压力脉动的来源,隔舌处的脉动主频以叶频为主;旋流泵内部充满大量回流与漩涡,也是造成流动不稳定的因素,该研究结果为旋流泵的稳定运行提供了理论依据。

Abstract

In order to deeply analyze the pressure fluctuation characteristics of the internal flow field of the vortex pump, a numerical calculation model of the vortex pump is established. Based on the standard k-ε turbulence model, the unsteady flow structure of the vortex pump is calculated. The pressure fluctuation of the monitoring points at vortex pump inlet, outlet and water chamber is analyzed, and the variation law of pressure in time domain and frequency domain is discussed. The pulsation characteristics are tested and verified. The results show that pressure pulsation has an obvious cyclic variation in the vortex pump under different operating condition. Besides, the impeller and volute tongue interference effect is the source of pressure pulsation and the blade frequency is the dominant frequency in the volute tongue. There are a large number of backflow and vortex inside the vortex pump, which is the factor of flow instability. The research results provide a theoretical basis for the stable operation of the vortex pump.

关键词

旋流泵;压力脉动;非定常;漩涡

Key words

vortex pump, pressure pulsation, unsteady, whirlpool

基金

浙江省教育厅科研项目(Y201839218);绍兴市科技计划项目(2018C10006);大学生科技创新项目(2019R452001)

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导出引用
沈姗姗, 薛明瑞, 周豪. 旋流泵内部非定常压力脉动分析[J].液压与气动, 2020, 0(06): 97-102. https://doi.org/10.11832/j.issn.1000-4858.2020.06.015
SHEN Shan-shan, XUE Ming-rui, ZHOU Hao. Analysis on Unsteady Pressure Pulsation of Inside Vortex Pump[J]. CHINESE HYDRAULICS & PNEUMATICS, 2020, 0(06): 97-102. https://doi.org/10.11832/j.issn.1000-4858.2020.06.015

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