潜水轴流泵内部固液两相流动的数值模拟  

Numerical simulation of solid-liquid two-phase turbulent flow in submersible axial-flow pump

作　　者：施卫东[1,2] 龙飞[1] 张德胜[1] 冷洪飞[1] 王国涛[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]江苏大学国家水泵及系统工程技术研究中心,江苏镇江212013

出　　处：《排灌机械工程学报》2012年第5期508-512,共5页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51079063);江苏省高等学校优秀科技创新团队计划项目;江苏高校优势学科建设工程项目

摘　　要：为分析潜水轴流泵流道内部固液两相流动特征,采用Mixture多相流模型,RNG k-ε湍流模型与SIMPLEC算法,应用Fluent软件对一污水处理厂用潜水轴流泵中固液两相流动进行了数值计算.并与清水单相流数值计算结果进行了对比,揭示了不同颗粒固相体积分布和颗粒直径条件下潜水轴流泵流道内的固液两相流动规律.结果表明:在叶轮流道内,固体颗粒主要分布于叶轮压力面上,而在叶轮吸力面的分布较少;在叶片压力面上,固体颗粒主要集中于叶片进口处和靠近轮毂处;当颗粒固相体积分布不变时,随着粒径的增大,会出现颗粒由压力面向背面迁移的趋势,而在背面会向出口处迁移;当粒径不变时,随着颗粒固相体积分布的增大,在叶片压力面上颗粒逐渐向进口和轮毂处靠拢,而在叶片吸力面上颗粒不断向着出口及靠近轮毂处迁移.The solid-liquid two-phase turbulent flow in a submersible axial-flow pump was simulated by using a software-Fluent with the mixture multiphase flow model,RNG k-ε turbulence model and SIMPLEC algorithm to study the characteristics of such a flow.The results of two-phase flow have been compared with those of water flow.The flow patterns at several volume fractions,particle diameters and solid densities were revealed.It is concluded that solid particles mainly accumulate near the lea-ding edge of pressure surface of blades but close to the hub in the flow channels of impeller.Solid particles tend to move to the suction side of blades as their diameter is increased at the same volume fraction.For the particles with the same diameter,as the solid volume fraction is increased,the solid particles on the pressure side tend to move to the blade leading edge and the hub,and those on the suction side tend to move to the outlet of impeller and the hub.

关 键 词：潜水轴流泵 固液两相流 数值模拟 颗粒直径 颗粒体积分数 

分 类 号：S277.9[农业科学—农业水土工程] TH312[农业科学—农业工程]