基于叶片冲角理论对轴流泵空化现象研究  

Research on the Cavitation Phenomenon of Axial Flow Pump Based on the Blade Attack Angle Theory

作　　者：王学敏 裴韩生 汪祈燕 刘旭辉 Wang Xuemin;Pei Hansheng;Wang Qiyan;Liu Xuhui(ShangHai institute of technology,Shanghai 201418,China;JiangSu Bo Yu pump company,Suzhou,Jiangsu 215211,China)

机构地区：[1]上海应用技术大学机械工程学院,上海201418 [2]江苏博禹泵业有限公司,江苏苏州215211

出　　处：《化工设备与管道》2023年第4期71-76,共6页Process Equipment & Piping

基　　金：上海市地方能力建设项目(20090503000);长三角科技创新项目(CSJ-202111221057/CSJ-202109230958);上海应用技术大学协同创新基金(XTCX2021-12)。

摘　　要：叶片冲角是由于叶片厚度而产生的出口角度差,其与轴流泵叶片内发生空化现象有关,文章基于叶片冲角理论,分析了高转速轴流泵内空化发生的规律,在此基础上,采用CFD仿真技术对650m3/h轴流泵空化现象进行了研究,研究表明当进口压力低至临界空化压力时,叶轮吸力面会发生空化现象,且空化面积从叶轮轮毂处向轮缘处扩散,叶轮压力面由于对水流做功而不会产生空化。基于叶片冲角理论结合CFD仿真技术,研究了不同叶片冲角对空化发生的影响,结果表明,适当减小叶片冲角能够抑制空化现象的发生,同时对提高轴流泵的综合性能有效,但当叶片冲角减少到一定值后,其对空化的抑制不明显。The blade attack angle is the outlet angle difference caused by the thickness of the blade,which is related to the cavitation phenomenon in the blade of the axial flow pump.Based on the blade angle of attack theory,this paper analyses the law of cavitation in high-speed axial flow pumps.On this basis,CFD simulation technology is used to study the cavitation phenomenon of 650 m3/h axial flow pumps.The research shows that when the inlet pressure When the critical cavitation pressure is low,cavitation will occur on the suction surface of the impeller,and the cavitation area will spread from the hub of the impeller to the rim,and the pressure surface of the impeller will not cause cavitation due to the work done on the water flow;based on the combination of blade attack angle theory and CFD simulation technology,the influence of different blade attack angles on cavitation is studied.The results show that appropriately reducing the blade attack angle can suppress the occurrence of cavitation,and at the same time it is effective in improving the overall performance of the axial flow pump.However,when the blade attack angle After decreasing to a certain value,its inhibition of cavitation is not obvious.

关 键 词：轴流泵 空化 CFD仿真 叶片冲角 

分 类 号：TH312[机械工程—机械制造及自动化]