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中文摘要：
将常用于水翼、螺旋桨等的空化模型应用于离心泵空化流数值计算,以比转速为94的离心泵为研究对象,在不同流量系数下,分别进行了空化性能的数值计算和试验研究.比较了计算和试验得到的空化性能曲线,发现各流量系数下模拟均能捕捉到较低空化数时扬程系数的下降,而且与试验结果较为一致.此外,还对设计工况下叶轮流道空泡和总压系数分布规律以及叶片压力系数分布规律进行了分析.对数值预测结果的分析表明：使用Kunz空化模型进行离心泵空化流数值计算能够较为真实地反映离心泵的空化性能.
英文摘要：
A cavitation model was introduced,which was frequently used in hydrofoils and propellers,to simulate numerically the cavitating flow of centrifugal pumps.The research object was a centrifugal pump with the specific speed equal to 94;the numerical predictions and experimental investigation were executed with three different flow coefficients,respectively.Subsequently,the cavitation performance curves obtained by simulation and experiment were compared.It can be found that the rapid drop in head coefficient at low cavitation numbers is captured for all flow coefficients,and the cavitation figures of simulation are in a good agreement with the experimental ones.In addition,the distribution of cavity,total pressure coefficient in impeller passage and pressure coefficient of the blade at the design point were obtained.The simulation result indicates that the application of Kunz model can truly show the cavitation performance of centrifugal pumps.
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