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

Abstract

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

CLC Number:

TH317

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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