自吸式离心泵自吸过程的非稳态数值模拟  

Unsteady numerical simulation of self-priming process of self-priming centrifugal pump

作　　者：赵万勇[1,2] 曹李健 王东伟[1,2] 胡嘉俊 ZHAO Wan-yong;CAO Li-jian;WANG Dong-wei;HU Jia-jun(School of Energy and Power Engineering,Lanzhou Univ.of Tech.,Lanzhou730050,China;Key Laboratory of Fluid Machinery and Systems of Gansu Province,Lanzhou Univ.of Tech.,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,甘肃兰州730050 [2]兰州理工大学甘肃省流体机械及系统重点实验室,甘肃兰州730050

出　　处：《兰州理工大学学报》2023年第2期35-40,共6页Journal of Lanzhou University of Technology

摘　　要：为研究自吸式离心泵的自吸过程,选取外混式自吸离心泵为研究对象,基于非稳态数值模拟方法,采用VOF多相流模型和标准k-ε模型,通过简化的边界条件,研究该自吸式离心泵的气液两相混合流动和分离过程,并且分析各监测点的含气率、速度、压力.结果表明:自吸过程中会产生气液分层现象,降低排气效率;在叶轮与蜗壳的间隙较小处,会产生高强度的含气率波动.In order to study the self-priming process of self-priming centrifugal pump,an externally mixed self-priming centrifugal pump is selected as the research object.Using the VOF multi-phase flow model and the standard k-εmodel,the gas-liquid two-phase mixed flow and separation process of this type of self-priming centrifugal pump is studied through simplified boundary conditions.By analyzing the gas content rate,velocity and pressure of each monitoring point,the following conclusions can be drawn:the gas-liquid stratification phenomenon is emerged in self-priming process with the exhaust efficiency reduced.At the small gap between the impeller and the volute,high-intensity gas content rate fluctuations is produced.

关 键 词：自吸泵 自吸阶段 回流孔 气液两相流 数值模拟 

分 类 号：TH317[机械工程—机械制造及自动化]