基于正压模型的离心叶轮空化性能分析  

Cavitation Performance Analysis of Centrifugal Pump Impeller Based on Positive Pressure Model

作　　者：陈喜阳[1] 彭玉成[1] 张克危[1] 周文朝 

机构地区：[1]华中科技大学能源与动力工程学院,湖北武汉430074 [2]上海凯士比泵有限公司,上海200245

出　　处：《水电能源科学》2012年第3期132-135,135,共4页Water Resources and Power

基　　金：中央高校基本科研业务费专项资金资助项目(0117120964)

摘　　要：鉴于空化数值模拟软件适用范围和计算精度尚需进一步检验,采用Star-CD软件,以一种界面捕获方法来模拟空化,并选择正压模型对离心泵内部流场进行模拟,计算得到了各单元和节点的压力、速度和液体体积分数,通过调整进口断面参考点的参考压力,模拟了叶轮内的空化发生和发展过程,对比了空化发生后的性能参数与基准值。结果表明,正压模型能较好地预测叶轮的空化性能。The scope of application and computing precision of cavitation numerical simulation software need to be in spected. Interface capturing method is introduced to simulate the cavitations with Star-CI） software. And the positive pressure model is selected to simulate the inner flow field of centrifugal pump. Then the pressure, velocity and liquid vol ume fraction of each element and node are calculated. At the same time, the cavitations gradually occurring and developing in the impeller are simulated by the way of adjusting the reference pressure of reference points in inlet section. Finally, the difference between the performance parameters after the cavitations and the reference values are compared. The resuits show that the positive pressure model can predict the impeller＇s cavitation performance very well.

关 键 词：离心叶轮 空化 正压模型 空化余量 

分 类 号：TV136.2[水利工程—水力学及河流动力学]