叶片包角对离心泵空化性能的影响  

Effects of Vane Wrap Angle on Cavitation Performance for Centrifugal Pumps

作　　者：王勇[1] 刘庆[2] 刘东喜[1] 王健[1] 

机构地区：[1]江苏大学流体机械工程技术研究中心,江苏镇江212013 [2]江苏大学能源与动力工程学院,江苏镇江212013

出　　处：《中国农村水利水电》2012年第11期110-113,共4页China Rural Water and Hydropower

基　　金：国家科技支撑计划项目(2011BAF14B03);江苏省产学研联合创新基金项目(BY2011140);江苏高校优势学科建设工程项目;江苏大学高级人才基金资助项目(12JDG044)

摘　　要：为了研究叶片包角对离心泵空化性能的影响,选择3台不同比转数的离心泵为研究对象,分别将各模型的设计包角做减少5°、增加5°和10°变化。基于ANSYS CFX软件应用标准k-ε湍流模型、均质多相模型和Zwart-Gerber-Belamri空化模型对各模型泵在包角变化时泵内的空化流场进行数值模拟,分析空化性能和空泡体积分布变化规律,并通过实验进行验证。结果表明:叶片包角对中高比转数离心泵空化性能的影响较大;随着叶片包角的增加,各模型必需空化余量的变化规律各不相同,但叶片包角存在一个最优值使离心泵在设计工况下的空化性能最佳。In order to study the effect of vane wrap angle on cavitation performance, three centrifugal pumps with different specific speeds are chosen as research subjects. The vane wrap angle of model pumps are varied to decrease 5 °, augment 5°and 10 ° respec- tively. The standard κ-ε turbulence model, homogeneous muhiphase model and Zwart-Gerber-Belamri cavitation model are applied to simulate cavitation flow in centrifugal pumps with different vane wrap angles based on ANSYS CFX, the variation regulation of cavi- tation performance and vapor volume distribution are analyzed and compared with the experiment results. The results show that the cavitation performance of medium and high specific speed centrifugal pumps are significantly affected by vane wrap angle; the varia-tion tendency of cavitation performance of model pumps are different from each other with the increases in vane wrap angle, but there would be an optimal value for vanewrap angle to obtain the best cavitation performance.

关 键 词：离心泵 空化性能 叶片包角 数值模拟 

分 类 号：TH311[机械工程—机械制造及自动化]