螺旋离心泵内非定常漩涡空化的计算与分析  

Unsteady vortex cavitation in a screw centrifugal pump

作　　者：邓育轩[1] 李仁年[1] 韩伟[1] 王东伟[1] 

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730000

出　　处：《华中科技大学学报（自然科学版）》2014年第9期118-121,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51079066)

摘　　要：为了对水力机械内部的漩涡空化进行深入研究,应用计算流体动力学软件(CFD)对一台螺旋离心泵进行了数值模拟计算,发现在一定工况下,螺旋离心泵内部由经过轮缘间隙的二次流所导致的漩涡涡核低压处会发生漩涡空化.捕捉到了该泵叶轮区域漩涡空化的形成-发展-分离的过程,发现该过程中的螺旋离心泵扬程出现大幅下降.实验与数值模拟的空化性能曲线数据基本符合.In order to analyze the vortex cavitation inside screw centrifugal pump,a numerical analysis was presented using the computer fluid dynamic software（CFD）.The vapor-liquid two-phase distribution inside screw centrifugal pump was extracted from the results,and the features of vapor volume fraction distribution inside the pump were comparatively analyzed when the vortex cavitation occured under different conditions.The process of inception,development and collapse of vortex cavitation were obtained by the results as well.The accuracy of numerical simulation by CFD codes was verified by experimental research results.

关 键 词：螺旋离心泵 漩涡空化 非定常流 叶顶间隙 计算流体力学 

分 类 号：TH311[机械工程—机械制造及自动化]