排灌机械工程学报2017，Vol.35Issue(12)：1018-1023,6.DOI:10.3969/j.issn.1674-8530.16.0197
颗粒粒径对导叶式离心泵动静叶栅内流动的影响
Effect of particle size on flow in stator and rotor cascades of guide vane type centrifugal pump
摘要
Abstract
In order to study the effect of particle size on the evolution of solid-liquid two-phase vortex structure,the vane type centrifugal pump is taken as the research object.Using the ICEM software on the research object of hexahedral mesh generation,the Mixture model and the large eddy simulation (LES) is used to simulate the whole flow field of the vane type centrifugal pump.The effects of particle size on the evolution of vorticity and the pressure pulsation in the impeller-guide vanes were analyzed and compared with those of 0.1,0.2 and 0.3 mm.The results show that with the particle size increasing,the overall particle volume fraction in the impeller region decreases,and particle size distribution is more nonuniform.In the guide vane region,with the increase of the particle size,in back of the guide vane appeared an obvious particle aggregation area.Owing to the different force on the particles in impeller and guide vane,with the increase of the particle size,the pressure of the guide vane decreases,and the pressure in the impeller region is not obvious.Because of the rotor-stator interaction between the impeller and the guide blade,the action on the particles in the impeller and guide blade is not the same,especially at the joint of the impeller and guide vane,pressure fluctuation is very unstable.关键词
导叶式离心泵/动静叶栅/固液两相流/涡量/压力脉动Key words
vane type centrifugal pump/static and dynamic cascade/solid-liquid two-phase flow/vorticity/pressure fluctuation分类
机械制造引用本文复制引用
李仁年,陈昊,韩伟,李雪峰,刘慧娟..颗粒粒径对导叶式离心泵动静叶栅内流动的影响[J].排灌机械工程学报,2017,35(12):1018-1023,6.基金项目
国家自然科学基金资助项目(51579125) （51579125）
