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Open Access

ARTICLE

Transient Experiments on a Prototype Pump with an Atypical Open Impeller for Different Discharge Valve Openings

Xiao Sun1, Huifan Huang1, Yuliang Zhang2, Lianghuai Tong3,*, Xiaowei Xu2, Xiaoqi Jia4, Litao Ou5
1 School of Mechanical Engineering, Hunan University of Technology, Zhuzhou, 412007, China
2 College of Mechanical Engineering, Quzhou University, Quzhou, 324000, China
3 Quzhou Academy of Metrology and Quality Inspection, Quzhou, 324024, China
4 The Zhejiang Provincial Key Lab of Fluid Transmission Technology, Zhejiang Sci-Tech University, Hangzhou, 310018, China
5 Zhuzhou Nanfang Valve Co., Ltd., Zhuzhou, 412000, China
* Corresponding Author: Lianghuai Tong. Email: email

Fluid Dynamics & Materials Processing https://doi.org/10.32604/fdmp.2024.050997

Received 24 February 2024; Accepted 20 May 2024; Published online 24 June 2024

Abstract

In order to obtain the transient characteristics of a low-speed centrifugal pump during the start-up and shutdown stages, dedicated experimental tests were conducted with eight different valve opening conditions. The Pearson correlation coefficient was used to reveal the linear correlation between variables. According to the results, the stable rotational speed decreases with increasing valve opening (rotational speed decreases from approximately 1472 to 1453 r/min), while the stable shaft power exhibits an increasing trend (shaft power increases from approximately 0.242 to 0.390 kW). The stable time and zeroing time of each parameter during start-up and shutdown processes vary, with the flow zeroing time significantly increasing with the relative flow, reaching up to 10.468 s, while the shaft power zeroing time is roughly between 1.219 and 1.375 s. The results demonstrate that with increasing valve opening, the stable and zeroing time of flow significantly increase (|r| greater than 0.95), while the stable and zeroing time of rotational speed, power, and head display a smaller sensitivity on the valve opening (|r| less than 0.6).

Keywords

Centrifugal pump; startup; shutdown; external characteristics; zeroing time

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