流体机械2016，Vol.44Issue(11)：15-19,5.DOI:10.3969/j.issn.1005-0329.2016.11.004
非定常大涡模拟下混流泵叶轮的轴向力研究
Study of Axial force on Impeller of Mixed-Flow Pump by unsteady Large Eddy Simulation
摘要
Abstract
With an attempt to investigate the axial force on impeller of mixed-flow pump,the mathematic model of three dimen-sional flow for guide vane mixed-flow pump was established.In order to predict the pump's performance and compare the steady simulation values,unsteady calculation values and empirical formula values with the experimental calculation values,the numerical simulation and performance prediction were carried out based on the unsteady large eddy simulation,subgrid-scale model and slid-ing grid technique.The results of showed that using the unsteady method to calculate the values of axial force on impeller is closer to the experiment values and empirical formula values;under the design conditions,the axial force's relative errors calculated by steady and unsteady simulation and the experimental calculation errors were both about 10%;under low flow conditions as well as high flow conditions,the axial force on impeller relative errors of steady simulation were about 30%,whereas the relative errors of unsteady simulation were about 10%,compared with experimental calculation errors.Therefore,unsteady method can predict the axial force on impeller of mixed-flow pump more accurately.关键词
混流泵/轴向力/数值模拟/设计工况/小流量工况/大流量工况Key words
mixed-flow Pump/axial force/numerical simulation/design conditions/low flow conditions/high flow conditions分类
机械制造引用本文复制引用
杜媛英,刘琳,刘刚,杨菲,郭小云..非定常大涡模拟下混流泵叶轮的轴向力研究[J].流体机械,2016,44(11):15-19,5.基金项目
国家自然科学基金项目（11372245）；陕西省自然科学基金项目（2014JM1015）；西安科技大学培育基金 （）
