排灌机械工程学报Issue(11)：940-944,5.DOI:10.3969/j.issn.1674-8530.14.1003
基于大涡模拟的动静叶栅内固液两相流动
Solid-liquid two-phase flow in rotor and stator cascades based on LES
摘要
Abstract
In order to study unsteady solid-liquid two-phase flows in rotor and stator cascades of cen-trifugal pump and understand the flow details in the flow passages,a centrifugal pump with radial di-ffuser is chosen,and then the unsteady 3D flow field is simulated based on the mixture multiphase model and sliding mesh as well as the large eddy simulation(LES)turbulence model with structures mesh generated in ICEM.The evolution process of coherent vortexes in the two cascades is exploited and the change in vortex pattern at different locations is analyzed in the solid-liquid two-phase flow by comparing with single phase water flow.The results show that the pattern of attached vortexes remains unchanged basically under two-phase and single phase flow conditions.The vortexes produced by im-peller rotation experience a series of evolution process,namely curling,merging and breaking.Even though the solid particles affect the distribution of vorticity in the flow field in the pump a little,they accelerate the dissipation of eddy energy and alter the vortex location and breaking pattern.The evolu-tion process of vortexes depends on positions considered in the cascades under either single or two-phase flow condition.关键词
离心泵/动静叶栅/固液两相流/大涡模拟/拟序涡结构演化Key words
centrifugal pump/stator-rotor cascades/solid-liquid two-phase flow/large eddy simulation/evolution process of vortex分类
机械制造引用本文复制引用
韩伟,岳婷,李仁年,金毅,申正精,张钊..基于大涡模拟的动静叶栅内固液两相流动[J].排灌机械工程学报,2015,(11):940-944,5.基金项目
国家自然科学青年基金资助项目 （）
