Open Access

ARTICLE

Investigation on the Changing Characteristics of Flow-Induced Noise in a Centrifugal Pump

by Guanpeng Li¹, Lihui Sun², Zhaoyang Wang¹, Chunguo An¹, Chang Guo^3,*, Shen Cheng³, Ming Gao^2,*

1 Shandong Electric Power Engineering Consulting Institute Corp., Ltd., Jinan, 250013, China
2 Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology & Equipment, School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
3 School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250353, China

* Corresponding Authors: Chang Guo. Email: ; Ming Gao. Email:

(This article belongs to the Special Issue: Recent Advances in Fluid Mechanics and Thermal Sciences)

Fluid Dynamics & Materials Processing 2021, 17(5), 989-1001. https://doi.org/10.32604/fdmp.2021.016507

Received 13 March 2021; Accepted 10 May 2021; Issue published 05 July 2021

Abstract

Centrifugal pumps are widely used in engineering for a variety of applications. A known drawback of these devices is the high-level noise generated during operations, which can affect their stability and adversely influence the entire working environment. By combining the Powell vortex sound theory, numerical simulations and experimental measurements, this research explores the trends of variation and the corresponding underlying mechanisms for the flow-induced noise at various locations and under different operating conditions. It is shown that the total sound source intensity (TSSI) and total sound pressure level (TSPL) in the impeller, in the region between the inlet to the outlet and along the circumferential extension of the volute, are much higher than those at pump inlet and outlet. Additionally, under various rotational speeds with the design flow rate (Condition 1), the TSSI and TSPL at pump inlet and outlet are higher than those obtained with the opening of the valve kept unchanged (Condition 2); vice versa when these two parameters are evaluated at various locations in the impeller and the volute under the Condition 2, they exceed the equivalent values obtained for the other Condition 1.

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Keywords

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