轮毂比对多相混输泵内流特性的影响  

Effect of Hub Ratio on Flow Field Characteristics in Multiphase Pump

作　　者：史广泰 李和林 刘宗库 王闪 Shi Guangtai;Li Helin;Liu Zongku;Wang Shan(School of Energy and Power Engineering,Xihua University,Chengdu 610039,China)

机构地区：[1]西华大学能源与动力工程学院,成都610039

出　　处：《流体机械》2020年第5期49-54,共6页Fluid Machinery

基　　金：国家重点研发计划项目(2018YF0905B205-05)。

摘　　要：为了探究轮毂比对多相混输泵内流特性的影响,选取一单级压缩级在不同轮毂比下利用ANSYS CFX软件对多相混输泵的内流特性进行数值计算.结果表明:随着轮毂比增大,动叶轮出口从轮毂到轮缘的压力梯度变小,动叶轮轮毂处气体聚集程度变小,流速变快、流动现象变好;在纯水工况下,随着轮毂比增加静叶轮内旋涡和回流现象减弱,位于静叶轮出口轮缘处的最大湍动能区域变小;在进口含气率IGVF=19%时,随着轮毂比的增加,静叶轮进口轮毂处的旋涡消失,静叶轮出口处的旋涡越来越集中,位于静叶轮出口轮缘处的最大湍动能区域逐渐变大.本研究结论对多相混输泵结构的优化设计有重要的参考意义.In order to explore the internal flow characteristics of multiphase pump with different hub ratio,a single-stage compression stage was selected to numerically simulate the internal flow characteristics of a multiphase pump with different hub ratio by ANSYS CFX software.The results show that:With the increase of hub ratio,the pressure gradient in the impeller trailing edge becomes smaller from hub to shourd,the less gas volume congregates at the hub of the impeller trailing edge,the flow velocity in the hub of the impeller trailing edge becomes faster,and the flow phenomenon becomes better.Under pure water,with the increase of hub ratio,the internal vortex and backflow phenomenon decreases in the diffuser,the maximum turbulent kinetic energy area at the trailing edge of the diffuser becomes smaller.When IGVF=19%,with the increase of hub ratio,the vortices at the inlet hub of the diffuser disappear,and the vortices at the outlet of the diffuser become more and more concentrated.The results of this study have important theoretical significance for the optimal design of multiphase pump structure.

关 键 词：多相混输泵 轮毂比 水力性能 流场特性 数值模拟 进口含气率 

分 类 号：TH3[机械工程—机械制造及自动化]