Coupled Helmholtz resonators for broadband Aeroacoustic noise mitigation

Zixiang Xiong; Xuxu Zhuang; Zhaoyong  Sun; Liuxian Zhao

doi:10.59400/sv1702

Coupled Helmholtz resonators for broadband Aeroacoustic noise mitigation

Zixiang Xiong Institute of Sound and Vibration Research, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
Xuxu Zhuang Institute of Sound and Vibration Research, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China
Zhaoyong Sun Beijing Institute of Graphic Communication, 1 Xinghua Avenue (Band 2), Beijing 102600, China
Liuxian Zhao Institute of Sound and Vibration Research, Hefei University of Technology, 193 Tunxi Road, Hefei 230009, China

Article ID: 1702

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DOI: https://doi.org/10.59400/sv1702

Keywords: Aeroacoustic noise; Helmholtz resonators; transmission loss; low-frequency absorption

Abstract

As a structurally simple acoustic element, Helmholtz resonators can exhibit strong resonance when acoustic waves enter the cavity, thus providing excellent sound absorption effects. Consequently, they are widely applied in automotive engine and exhaust systems. This paper systematically investigates the noise reduction performance of multiple coupled Helmholtz resonators under conditions with and without tangential flow. A finite element simulation model with multiple Helmholtz resonators is established by employing COMSOL Multiphysics software to solve the linearized Navier-Stokes equations in the frequency domain. The simulation results demonstrate that the structure, which couples multiple Helmholtz resonators, can effectively broaden the low-frequency sound absorption band under the influence of a flow field, enhancing the transmission loss across the entire low-frequency band. This structure holds significant potential for applications in automotive exhaust systems and aero-engine noise reduction.

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Published

2024-12-18

How to Cite

Xiong, Z., Zhuang, X., Sun, Z., & Zhao, L. (2024). Coupled Helmholtz resonators for broadband Aeroacoustic noise mitigation . Sound & Vibration, 59(1), 1702. https://doi.org/10.59400/sv1702

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