离心泵空蚀湍流的非定常数值模拟  

Unsteady numerical simulation of cavitating turbulent flow in centrifugal pumps

作　　者：刘宜[1] 赵希枫[1] 齐学义[1] 惠伟安[1] 张文军[1] 

机构地区：[1]兰州理工大学流体动力与控制学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2008年第3期44-47,共4页Journal of Lanzhou University of Technology

基　　金：温州市永嘉县科技项目基金(2007115)的资助.

摘　　要：为了研究离心泵内部的空蚀流动,结合Fluent软件中的空蚀模型和混合流体两相流模型,对离心泵流道内的三维湍流空蚀流场进行非定常数值模拟.根据模拟计算结果的液相和空泡相流动特征,预测离心泵在设计工况下运行时流道内空蚀发生的位置和程度;通过分析空蚀发生过程中叶片上的压力分布,揭示出离心泵流道内空蚀流场的内在特性,并可对泵的性能进行预估.In order to study the internal cavitating flow in centrifugal pumps, the unsteady numerical simulation of the three-dimensional cavitating turbulent flow in the flow-passage of centrifugal pumps was numerically simulated by using the cavitation model and two-phase flow model provided by software Fluent. Based on the simulation results concerning the feature of both liquid-phase and cavity-phase flow, the region and the degree of cavitation occurred in the flow passage of the centrifugal pump under design working condition were predicted. The pressure distribution on the blade in the process of cavitation was analyzed and the internal characteristics of cavitation flow in the flow passage of a centrifugal pump was revealed, so that the performance of a pump could be estimated.

关 键 词：离心泵 非定常数值模拟 空蚀 叶片 

分 类 号：TH311[机械工程—机械制造及自动化]