Open Access

ARTICLE

Study on Energy Conversion Characteristics in Volute of Pump as Turbine

Senchun Miao^1,2,*, Hongbiao Zhang¹, Fengxia Shi¹, Xiaohui Wang¹, Xijin Ma¹

1 School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, China
2 Jiangsu Shuangda Pump Valve Group Co., Ltd., Jingjiang, China

* Corresponding Author: Senchun Miao. Email:

Fluid Dynamics & Materials Processing 2021, 17(1), 201-214. https://doi.org/10.32604/fdmp.2021.012950

Received 21 July 2020; Accepted 11 January 2021; Issue published 09 February 2021

Abstract

A volute is a curved funnel with cross-sectional area increasing towards the discharge port. The volute of a centrifugal pump is the casing hosting the fluid being pumped by the impeller. In Pump-as-turbine devices (PAT), vice versa the volute plays the role of energy conversion element. In the present analysis, this process is analyzed using CFD. The results show that in the contraction section of volute the conversion between dynamic pressure energy and static pressure energy essentially depends on the reduction of flow area, while in the spiral section, frictional losses also play a significant role. From the throat to the end of the volute, the flow decreases in a wave-like manner.

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Keywords

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