基于能量损失模型的轴流泵空化特性研究  

Study on cavitation characteristics of axial flow pump based on energy loss model

作　　者：范云逸 周鹏 陈岗 戴毓帝 于鑫 FAN Yunyi;ZHOU Peng;CHEN Gang;DAI Yudi;YU Xin(Taicang City Embankment Management Agency,Suzhou 215400,China;Taizhou Branch of Jiangsu Province Hydrology and Water Resources Investigation Bureau,Taizhou 215300,China;Taicang Liuhe Town Comprehensive Service Center,Taicang 215400,China;Yangzhou Surveying and Design Institute of Water Resources Co.,Ltd.,Yangzhou 225100,China)

机构地区：[1]太仓市堤闸管理处,江苏苏州215400 [2]江苏省水文水资源勘测局泰州分局,江苏泰州225300 [3]太仓市浏河镇综合服务中心,江苏苏州215400 [4]扬州市勘测设计研究院有限公司,江苏扬州225100

出　　处：《江苏水利》2024年第8期26-30,共5页Jiangsu Water Resources

摘　　要：以比转速为1500的轴流泵为研究对象,采用SST k-ω湍流模型和ZGB空化模型,基于熵产理论,开展了轴流泵空化特性及能量损失特性研究。数值模拟结果表明:基于ZGB空化模型,轴流泵的临界汽蚀余量为3.7 m;气泡均最先出现在叶片进口边的背面,空化越严重,空泡分布范围越大,严重时充满整个叶轮通道;深度空化的总熵产损失是无空化的1.22倍,叶轮内脉动熵产损失最大,时均熵产损失最小,高损失区域主要分布在叶片表面和尾迹附近。研究成果可为设计低能耗、空化性能优异的旋转机械提供参考。An axial flow pump with a specific speed of 1500 was chosen as the research object.The study applied the SST k-ωturbulence model and the ZGB cavitation model and studied the cavitation characteristics and energy loss of the axial flow pump based on the entropy generation theory.Numerical simulation results indicate that,based on the ZGB cavitation model,the critical cavitation margin of the pump is 3.7 meters.Bubbles first appear at the backside of the blade inlet edge,and the more severe the cavitation,the larger the distribution range of bubbles,and in severe cases,they fill the entire impeller passage;The total entropy generation loss of deep cavitation is 1.22 times that of no cavitation.The pulsating entropy generation loss inside the impeller is the largest,and the time averaged entropy generation loss is the smallest.The high loss areas are mainly distributed at the blade surface and near the wake.These research findings can serve as valuable reference for the design of rotating machinery with low energy consumption and excellent cavitation performance.

关 键 词：轴流泵 空化特性 能量损失 数值模拟 熵产理论 

分 类 号：TV675[水利工程—水利水电工程]