Open Access

ARTICLE

Experimental Analysis of Radial Centrifugal Pump Shutdown

by Xiao Sun¹, Jiangbo Tong¹, Yuliang Zhang^2,*, Haibing Cai³, Wen Zhou⁴, Xiaoqi Jia⁵, Litao Ou⁶

1 School of Mechanical Engineering, Hunan University of Technology, Zhuzhou, 412007, China
2 College of Mechanical Engineering, Quzhou University, Quzhou, 324000, China
3 Zhejiang Testing & Inspection Institute for Mechanical and Electrical Products Quality Co., Ltd., Hangzhou, 310014, China
4 Quzhou Special Equipment Inspection Center, Quzhou, 324000, China
5 The Zhejiang Provincial Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
6 Zhuzhou Nanfang Valve Co., Ltd., Zhuzhou, 412000, China

* Corresponding Author: Yuliang Zhang. Email:

Fluid Dynamics & Materials Processing 2024, 20(4), 725-737. https://doi.org/10.32604/fdmp.2023.045541

Received 30 August 2023; Accepted 27 November 2023; Issue published 28 March 2024

Abstract

Centrifugal pumps are widely used in the metallurgy, coal, and building sectors. In order to study the hydraulic characteristics of a closed impeller centrifugal pump during its shutdown in the so-called power frequency and frequency conversion modes, experiments were carried to determine the characteristic evolution of parameters such as speed, inlet and outlet pressure, head, flow rate and shaft power. A quasi-steady-state method was also used to further investigate these transient behaviors. The results show that, compared to the power frequency input, the performance parameter curves for the frequency conversion input are less volatile and smoother. The characteristic time is longer and the response to shutdown is slower. The quasi-steady-state theoretical head-flow curves match the experimental head-flow curves more closely at low flow rates when the frequency conversion input is considered. Moreover, in this case, the similarity law predicts the hydraulic performance more accurately.

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Keywords

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