Duct aeroacoustic control by multiple flexible panels

Harris K.H. Fan, Cheng Shen, Randolph C.K. Leung

Research output: Unpublished conference presentation (presented paper, abstract, poster)Conference presentation (not published in journal/proceeding/book)Academic researchpeer-review

Abstract

The flow duct aeroacoustic control method by using a flush-mounted membrane has been proven that provides excellent silencing performance for broadband noise. The principle is to utilize the acoustically excited panel vibration to affect the incident noise propagation, reflect the noise to upstream and cause transmission loss in downstream. In addition, the reflection level is able to be promoted by using more than one membrane. The performance of the aeroacoustic control by using two membranes is studied theoretically and numerically in the present work. A simplified model in frequency domain is built and solved analytically to resolve the acoustic-structural response when the double panels in the duct are exposed to broadband incident acoustic wave. Besides, a time domain analysis is also conducted by solving the Navier-Stokes equations coupled with the membrane dynamic numerically for validating the frequency domain model. The acoustic-structural response under the two membranes setup is studied. The silencing performance is much better than that with only one membrane.

Original languageEnglish
Publication statusPublished - 1 Jan 2018
Event47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018 - Chicago, United States
Duration: 26 Aug 201829 Aug 2018

Conference

Conference47th International Congress and Exposition on Noise Control Engineering: Impact of Noise Control Engineering, INTER-NOISE 2018
CountryUnited States
CityChicago
Period26/08/1829/08/18

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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