分流叶片离心泵叶轮内变工况三维数值分析  

Numerical simulation for inner flow of impeller with splitting vanes of centrifugal pump under different operating condition

作　　者：何有世[1] 袁寿其[1] 郭晓梅[1] 张金凤[1] 

机构地区：[1]江苏大学流体中心,江苏镇江212013

出　　处：《江苏大学学报（自然科学版）》2005年第3期193-197,共5页Journal of Jiangsu University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50279011)

摘　　要：对带分流叶片的离心泵叶轮不同工况下的内部流动进行数值模拟分析.计算采用雷诺时均方程和修正了的k-ε湍流模型,在压强连接的隐式修正法建立的压力速度校正方程基础上,利用贴体坐标系和交错网格技术进行计算.计算结果揭示了带分流叶片的离心泵叶轮内部湍流流动不同工况下的速度分布及压力分布规律,对叶轮内部流动状况进行了分析和研究.结果表明随着流量的增加,叶轮内相对速度增大明显;叶轮内整体动压随流量增加而下降,动压在叶轮内的分布场为大流量比小流量更加均匀.Inner flow of impeller of centrifugal pump with splitting vanes under different operating condition was simulated for the first time. By adopting time-averaged N-S equations and k-Ε model, with the body-fitted coordinates and staggered grid, simulation was carried out on the base of SIMPLEC algorithm. Different velocity and pressure distributions of the inner flow of impeller with splitting vanes under different operating conditions were obtained. The results show that there is an obvious increase of relative velocity with the increase of flow flux, and the dynamic pressure distribution in impeller is more uniform under larger flux.

关 键 词：分流叶片 离心泵 工况 湍流 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]