隔舌安放角对固液两相流离心泵性能的影响研究  

Research on the Influence of the Inlet Width of the Volute on the Unsteady Performance of the Centrifugal Pumps

作　　者：钟卫 符杰 何峻 陈伟明 宋文武 ZHONG Wei;FU Jie;HE Jun;CHEN Wei-ming;SONG Wen-wu(Key Laboratory of Fluid and Power Machinery,Ministry of Education,Xihua University,Chengdu 610039,Sichuan Province,China;College of Energy and Power Engineering,Xihua University,Chengdu 610039,Sichuan Province,China)

机构地区：[1]西华大学流体及动力机械教育部重点实验室,成都610039 [2]西华大学能源与动力工程学院,成都610039

出　　处：《中国农村水利水电》2021年第11期165-170,共6页China Rural Water and Hydropower

基　　金：国家自然科学基金青年科学基金项目(52009115);西华大学流体及动力机械教育部重点实验室开放基金资助项目(ycjj2018038)。

摘　　要：为研究不同隔舌安放角对固液两相流离心泵非定常特性的影响,利用CFX软件采用RNG k-ε湍流模型对5种不同隔舌安放角蜗壳式离心泵进行全流道数值模拟,分析隔舌安放角对离心泵内外特性、压力脉动等的影响。研究结果表明:适当的增加隔舌安放角对扬程的影响较小,但水力效率的高效区范围变宽且向大流量工况偏移,泵的内部流动有所改善;在不同隔舌安放角条件下,固液两相离心泵内压力脉动均呈周期性变化,并随着隔舌安放角的增大,离心泵蜗壳螺旋段内的压力脉动呈减小的趋势。作用在隔舌和叶轮上的径向力均呈五角星花瓣形分布,并且作用在隔舌上的径向力远大于叶轮上的径向力,增大蜗壳的隔舌安放角会使蜗壳隔舌处的径向力明显且均匀的增大。In order to study the influence of different tongue installation angles on the unsteady characteristics of solid-liquid two-phase flow centrifugal pumps,the full flow numerical simulation of five different tongue installation angle volute centrifugal pumps is carried out by using CFX software and the RNG k-εturbulence model.The influence of the installation angle of the diaphragm on the internal and external characteristics of the centrifugal pump,pressure pulsation,etc is analyzed.The research results show that increasing the installation angle of the separation tongue appropriately has little effect on the head,but the range of the high-efficiency area of hydraulic efficiency widens and shifts to the large flow condition,and the internal flow of the pump is improved.Under different condition setting angles,the tongue,solidliquid two-phase centrifugal pump pressure pulsations show periodic variations,and the tongue with increasing setting angle of the pressure pulsation in the helical segments shows a decreasing tendency centrifugal pump.The radial force acting on the diaphragm and the impeller is distributed in the shape of a five-point star petal,and the radial force acting on the diaphragm is much more than the radial force on the impeller.The radial forces acting on the diaphragm tongue and impeller are in the shape of five-point petals,and the radial forces acting on the diaphragm tongue are far more than the radial forces acting on the impeller.Increasing the angle of the diaphragm tongue of the volute will make the radial forces at the diaphragm tongue of the volute increase significantly and evenly.

关 键 词：离心泵 固液两相 隔舌安放角 压力脉动 径向力 

分 类 号：TV136[水利工程—水力学及河流动力学] TH311[机械工程—机械制造及自动化]