排灌机械工程学报Issue(4)：302-307,6.DOI:10.3969/j.issn.1674-8530.13.0207
潜水轴流泵内部流场压力脉动的数值模拟
Numerical analysis of pressure fluctuation of internal flow in submersible axial-flow pump
摘要
Abstract
The pressure fluctuation in flow field has important influence on the operation stability of axial-flow pumps.In order to precisely analyze the pressure fluctuation in submersible axial-flow pumps,the RNG k-εturbulence model and SIMPLEC algorithm were adopted to investigate the three dimensional turbulent flow and the pressure fluctuation in an axial-flow pump.The calculated results show that the predicted performance curves of pump were in good agreement with the experiment.The maximum amplitude of the pressure fluctuation occurs at the inlet of the impeller,and the main fre-quency of the pressure fluctuation inside the pump is the same as the blade passing frequency when the pressure fluctuation behind the guide-vanes is dominated by low-frequency.From hub to tip of the blade surface,the low frequency components of the fluctuation decreases .On the pressure surface of the blade,the pressure fluctuation amplitude decreases from tip to hub and increases from inlet to out-let of the impe-ller.The fluctuation amplitude on the outer tip is 1 .22 times higher than that on the hub at the inlet.On the suction surface,the pressure fluctuation amplitude on tip is 1.77 times of thehub at the inlet and is 0.92 times of the hub at the outlet of the impeller.The amplitude on the suctionsurface is significantly less than that on the pressure surface of the blade.At the inlet of the impeller,the maximum amplitude of the pressure fluctuation happens at 0.8Q flow rate which is about twice thevalue at the design flow rate.The abovesimulated results can provide some references for further analyzing the pressure fluctuation of axialflow pumps.关键词
潜水轴流泵/数值模拟/压力脉动/外特性/时频特性Key words
submersible axial-flow pump/numerical simulation/pressure fluctuation/external performances/time frequency characteristics分类
机械制造引用本文复制引用
张玉新,王秀叶,丁鹏,唐学林..潜水轴流泵内部流场压力脉动的数值模拟[J].排灌机械工程学报,2014,(4):302-307,6.基金项目
新世纪优秀人才支持计划项目（NETC-10-0784）；国家自然科学基金资助项目（51179192，51139007）；中央高校基本科研业务费专项资金项目 （）
