Numerical simulation of starting process of axial flow pump with quick-stop gate
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Abstract:
Research on the starting process of the axial flow pump is a very important part of the research on pump stations. In order to capture accurately the dynamic characteristics of an axial flow pump in the starting process, a three-dimensional geometrical model of the full passage was established. The CFD software Fluent, the dynamic mesh technology based on finite volume method, and the VOF multiphase flow model were all used to conduct three-dimensional transient numerical simulation of the axial flow pump, from which the variation patterns of external characteristic parameters were obtained. When the opening time of the gate was 60 s, the maximum head was 2.76 m at 12 s, which was 1.28 times of the rated head. Less starting time of the gate led to a lower starting head, but it aggravated the back-flow. The results showed that the dynamic mesh technology can be used in 3D numerical simulation of the starting transition process of an axial flow pump with a quick-stop gate. The results can help optimize the hydraulic parameters of pump stations and can be used as a reference for the research of the transition process of axial flow pump units.
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