基于CFD的长短叶片离心泵叶轮切割性能分析  

Performance analysis of impeller cutting for centrifugal pumps with long and short blades based on CFD

作　　者：连松锦 吴尚璟 刘功喜 吴俊芳 魏恒 林佳琪 Lian Songjin;Wu Shangjing;Liu Gongxi;Wu Junfang;Wei Heng;Lin Jiaqi

机构地区：[1]福建省农业机械化研究所,福建福州350005

出　　处：《木工机床》2023年第3期22-25,共4页Woodworking Machinery

摘　　要：文章基于ANSYS17.0平台的计算流体软件CFX,对一长短叶片离心泵在叶轮切割前后的内流场进行了数值求解。根据计算结果分别预测了切割5%和10%叶轮外径后离心泵的性能曲线,并分析了叶轮外径切割后对泵内部叶轮中间截面相对速度和静压的影响。结果表明:随着叶轮外径切割量的增大,长短叶片离心泵的扬程有所下降,泵最优工况点向小流量工况偏移,大流量工况效率随着外径切割量的增大而加速下降。Based on the computational fluid software CFX in the ANSYS 17.0 platform,the internal flow field of a centrifugal pump with long and short blades before and after cutting the impeller was numerically solved.Based on the calculation results,the performance curves of the centrifugal pump were predicted after cutting 5%and 10%of the impeller outer diameter,and the influ-ence of cutting the impeller outer diameter on the relative velocity and static pressure distribution of the middle section of the impel-ler inside the pump was analyzed.The results show that as the cutting amount of the outer diameter of the impeller increases,the head of the centrifugal pump with long and short blades decreases,and the optimal operating point of the pump shifts towards the low flow condition.Under the high flow conditions,the efficiency decreases rapidly with the increase of outer diameter cutting amount.

关 键 词：长短叶片 离心泵 切割 内外特性 

分 类 号：TH311[机械工程—机械制造及自动化]