自吸式离心泵自吸过程的非稳态数值模拟

兰州理工大学学报 ›› 2023, Vol. 49 ›› Issue (2): 35-40.

自吸式离心泵自吸过程的非稳态数值模拟

赵万勇^*1,2, 曹李健¹, 王东伟^1,2, 胡嘉俊¹

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

收稿日期:2021-12-09 出版日期:2023-04-28 发布日期:2023-05-05
通讯作者: 赵万勇(1962-),男,甘肃武威人,教授.Email:zhaowy@lut.edu.cn

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

ZHAO Wan-yong^1,2, CAO Li-jian¹, WANG Dong-wei^1,2, HU Jia-jun¹

1. School of Energy and Power Engineering, Lanzhou Univ. of Tech., Lanzhou 730050, China;
2. Key Laboratory of Fluid Machinery and Systems of Gansu Province,Lanzhou Univ. of Tech., Lanzhou 730050, China

Received:2021-12-09 Online:2023-04-28 Published:2023-05-05

摘要/Abstract

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.

关键词: 自吸泵, 自吸阶段, 回流孔, 气液两相流, 数值模拟

Abstract: 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-ε model, 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.

Key words: self-priming pump, self-priming process, reflowing hole, gas-liquid two-phase flow, numerical simulation

中图分类号:

TH317

赵万勇, 曹李健, 王东伟, 胡嘉俊. 自吸式离心泵自吸过程的非稳态数值模拟[J]. 兰州理工大学学报, 2023, 49(2): 35-40.

ZHAO Wan-yong, CAO Li-jian, WANG Dong-wei, HU Jia-jun. Unsteady numerical simulation of self-priming process of self-priming centrifugal pump[J]. Journal of Lanzhou University of Technology, 2023, 49(2): 35-40.

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