A Numerical Study on the Effect of the Backflow Hole Position on the Performances of a Self-Priming Pump  

作　　者：Dongwei Wang Lijian Cao Weidong Wang Jiajun Hu 

机构地区：[1]School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou,730050,China [2]Sanlian Pump Industry Co.,Ltd.,Ma’anshan,243000,China

出　　处：《Fluid Dynamics & Materials Processing》2024年第5期1103-1122,共20页流体力学与材料加工（英文）

基　　金：the National Natural Science Foundation of China(Research Project No.52169018).

摘　　要：A self-priming pump is a centrifugal pump that has the ability to prime itself. Typically, its performance dependson the configuration of its reflux hole. In this study, the ANSYS FLUENT software is used to investigate the effectsof three different radial positions of the reflux hole on gas-liquid two-phase distribution, pressure pulsation, andimp during self-priming. The research results indicate that: (1) The effective channel size for the reflux liquid toenter the volute varies depending on the location of the reflux hole. The effect of the impeller rotation on thereflux liquid becomes more obvious as the setting distance of the reflux aperture decreases. (2) The position ofthe reflux hole significantly affects the gas phase mass fraction inside the impeller, resulting in a significant reductionin the time it takes for the mass fraction to exceed 80%. (3) The position of the reflux hole significantly affectsthe average pressure on each monitoring surface. (4) Placing the reflux hole at a excessively distant radial distancecan result in an excessive vertical component. (5) The self-priming performance of the pump can be improved tosome extent by placing the return hole at a small radial distance.

关 键 词：Self-priming pump self-priming time numerical calculation gas-liquid two-phase flow 

分 类 号：TH3[机械工程—机械制造及自动化]