Open Access

ARTICLE

Numerical Analysis of Flow-Induced Vibration and Noise Generation in a Variable Cross-Section Channel

by Youhao Wang¹, Chuntian Zhe¹, Chang Guo², Jinpeng Li³, Jinheng Li³, Shen Cheng², Zitian Wu¹, Suoying He¹, Ming Gao^1,*

1 Shandong Engineering Laboratory for High-Efficiency Energy Conservation and Energy Storage Technology & Equipment, School of Energy and Power Engineering, Shandong University, Jinan, 250061, China
2 School of Energy and Power Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250301, China
3 Shandong Beinuo Cooling Equipment Co., Ltd., Dezhou, 253000, China

* Corresponding Author: Ming Gao. Email:

(This article belongs to the Special Issue: Advances in Thermodynamic System and Energy Conservation Technology)

Fluid Dynamics & Materials Processing 2023, 19(12), 2965-2980. https://doi.org/10.32604/fdmp.2023.029292

Received 11 February 2023; Accepted 14 June 2023; Issue published 27 October 2023

Abstract

Flow channels with a variable cross-section are important components of piping system and are widely used in various fields of engineering. Using a finite element method and modal analysis theory, flow-induced noise, mode shapes, and structure-borne noise in such systems are investigated in this study. The results demonstrate that the maximum displacement and equivalent stress are located in the part with variable cross-sectional area. The average excitation force on the flow channel wall increases with the flow velocity. The maximum excitation force occurs in the range of 0–20 Hz, and then it decreases gradually in the range of 20–1000 Hz. Additionally, as the flow velocity rises from 1 to 3 m/s, the overall sound pressure level associated with the flow-induced noise grows from 49.37 to 66.37 dB. Similarly, the overall sound pressure level associated with the structure-borne noise rises from 40.27 to 72.20 dB. When the flow velocity is increased, the increment of the structure-borne noise is higher than that of the flow-induced noise.

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Keywords

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