Open Access

ARTICLE

SELF-COUPLING NUMERICAL CALCULATION OF CENTRIFUGAL PUMP STARTUP PROCESS

L. Cheng, Y. L. Zhang^†

College of Mechanical Engineering, Quzhou University, Quzhou, Zhejiang, 324000, China
† Corresponding author. Email: zhang002@sina.com

Frontiers in Heat and Mass Transfer 2022, 18, 1-6. https://doi.org/10.5098/hmt.18.26

Abstract

To obtain the transient characteristics of a centrifugal pump during a rapid startup process accurately, a circulating piping system, including the pump, is established. A full three-dimensional unsteady incompressible viscous flow of a low-specific speed centrifugal pump during rapid startup is numerically simulated using the finite volume method, RNG k-ε turbulence model, sliding grid technology, dynamic grid technology, and userdefined function. Results show that the effect of dynamic and static interference becomes remarkably evident with the increase in speed in the starting process. The effect of dynamic and static interference makes the flow rate show small fluctuation characteristics, and the flow rate rises slowly in the initial stage of startup. The evolution of the transient flow field lags behind that of the quasi-steady flow field, which may be related to the fact that the pressure energy is not converted into kinetic energy in time during the transient process. The entire startup process shows evident transient behavior.

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Keywords

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