为探究分流叶片对离心泵空化性能的影响，以IS80-50-200模型泵为研究对象，在模型泵上设计添加了3种不同进口直径分流叶片，利用CFD 软件对离心泵进行全流道三维定常湍流空化数值模拟，分析不同汽蚀余量对离心泵空化特性和叶轮内部流场的影响，探究叶轮空化初生和发展规律。结果表明：添加分流叶片后，泵的扬程、效率均有一定程度的提高，且分流叶片的进口直径对扬程和效率的影响不大；泵的H-Q曲线驼峰减弱；泵的抗空化性能均有提高。在研究的水力模型中，当离心泵短叶片进口直径为0.8D2时，泵的抗空化性能最好。添加分流叶片后，长叶片两侧压差减小，叶轮进口处的低压区范围变小，有利于提高泵的抗空化能力。

In order to explore the influence of splitter blades on the cavitation performance of centrifugal pumps， a IS80-50-200 model pump and 3 kinds of centrifugal pump with Splitter Blades of different inlet diameter were studied， the numerical simulation is carried out by CFD software， to analyze the performance of pump cavitation and the internal flow of impeller at different NPSHA， exploring the inception and distribution regularity of impeller cavitation. The results show that pump head and efficiency are improved by adding splitter blades， but the inlet diameter of splitter blades has little effect on head and efficiency; the H-Q curves of pumps become better and the pump cavitation performance are all improved. In all of the hydraulic models，when the inlet diameter of splitter blade is 0.8D2， the cavitation performance of pump reaches the highest. After adding splitter blades， pressure differences on both sides of long blade is reduced， low pressure area at impeller inlet becomes smaller，It is beneficial to improve the cavitation performance of pumps.

TK263.3

基金项目：国家自然科学基金（51379179）、流体及动力机械四川省科技创新研究团队（2011JTD0016）、西华大学研究生创新基金项目，基金号：ycjj2016096