摘要
应用N-S方法和标准k-ε湍流模型,采用SIMPLE法,对离心泵内部三维固液两相流进行了模拟计算。得到不同固相(颗粒)浓度下的离心泵内部压力分布和内部颗粒浓度分布情况,并且基于流固耦合原理对离心泵叶轮进行结构分析,采用多物理场协同仿真平台ANASYS Workbench,通过单向流固耦合技术实现离心泵叶轮结构的仿真计算,获得了离心泵叶轮在同一工况、不同固相浓度下的等效应力及变形情况。计算结果表明,蜗壳中压力和固相体积浓度分布规律都是从进口处随蜗壳半径增大而增大,并且在隔舌处出现浓度分布不均匀的现象。各种计算条件下,叶轮的等效应力和总变形情况变化趋势基本上相同,叶轮的应力分布都不均并且存在局部应力集中,固相体积浓度越大离心泵叶片的变形也越严重。
Based on the N-S equation and the traditional k-ε turbulent model, the SIMPLE method was applied to simulate the three-dimensional solid-liquid two-phase flow field in the centrifugal pump. The distributions of internal pressure and particle concentration were obtained under different concentrations of the solid phase in the centrifugal pump. The structure of centrifugal impeller was analyzed based on the fluid-structure interaction theorem. The multi-physical co-simulation platform ANASYS Workbench was used,and the numerical simulation of centrifugal impeller structure was conducted base on the one-way fluidstructure interaction technology. The equivalent stress and deformation under the different concentrations of the solid phase and same working conditions were determined. The results showed that the volute pressure and solid volume concentration increase with the increasing of spiral radius from the entrance, and the uneven distribution of regional concentration appears at the tongue. Under all the calculation conditions, the variation trends of equivalent stress and total deformation of the impeller are basically the same. The stress distribution of the impeller is uneven and local stress concentration occurs. The greater the solids volume concentration, the higher the deformation of centrifugal pump impeller.
出处
《南水北调与水利科技》
CAS
CSCD
北大核心
2015年第3期506-509,共4页
South-to-North Water Transfers and Water Science & Technology
关键词
离心泵
叶轮
固液两相流
流固耦合
数值模拟
centrifugal pump
impeller
solid-liquid two-phase flow
fluid-structure interactiom numerical simulation
作者简介
章城（1989-），男，浙江苍南人，主要从事计算流体动力学和流体机械数值模拟研究。Email：zjutzc@126．com
