Design and evaluation of an acoustic metamaterial for ducted fan noise control

IF 3.4 2区物理与天体物理 Q1 ACOUSTICS

Applied Acoustics Pub Date : 2025-02-20 DOI:10.1016/j.apacoust.2025.110612

Wei-Qin Wu, Yong-Bin Zhang, Liang Xu, Liu-Xian Zhao, Ting-Gui Chen

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引用次数: 0

Abstract

Existing noise control methods for ducted fans usually require modifications to the fan or runner structure, and the installation of silencers may affect ventilation efficiency. In order to address the shortcomings of the above methods, we propose the application of acoustic metamaterials to ducted fan noise control. A Helmholtz-type acoustic metamaterial has been designed to simultaneously control the first four orders of tonal noise, and this metamaterial is characterized by its small size and thin profile, allowing it to be flexibly applied to fan ducts. The acoustic absorption characteristics of this metamaterial, when employed as a duct bypass, have been analyzed using theoretical models and experimental validation. The findings indicate that the acoustic metamaterial exhibit significant acoustic transmission loss at the absorption frequency when employed as a duct bypass. To comprehensively evaluates the effects of acoustic metamaterials on ducted fans, a hybrid simulation approach combining Computational Fluid Dynamics (CFD) with the acoustic Finite Element Method (FEM) is utilized. The numerical simulation results indicate that acoustic metamaterials can effectively attenuate ducted fan noise while maintaining a minimal impact on ventilation efficiency.

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来源期刊

Applied Acoustics 物理-声学

CiteScore

7.40

自引率

11.80%

发文量

618

审稿时长

7.5 months

期刊介绍： Since its launch in 1968, Applied Acoustics has been publishing high quality research papers providing state-of-the-art coverage of research findings for engineers and scientists involved in applications of acoustics in the widest sense. Applied Acoustics looks not only at recent developments in the understanding of acoustics but also at ways of exploiting that understanding. The Journal aims to encourage the exchange of practical experience through publication and in so doing creates a fund of technological information that can be used for solving related problems. The presentation of information in graphical or tabular form is especially encouraged. If a report of a mathematical development is a necessary part of a paper it is important to ensure that it is there only as an integral part of a practical solution to a problem and is supported by data. Applied Acoustics encourages the exchange of practical experience in the following ways: • Complete Papers • Short Technical Notes • Review Articles; and thereby provides a wealth of technological information that can be used to solve related problems. Manuscripts that address all fields of applications of acoustics ranging from medicine and NDT to the environment and buildings are welcome.