Acoustic-structural interaction of flexible walls in a flow duct

Harris K H Fan, Chi Kin Randolph Leung, Garret C Y Lam, K. H. Li

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

Fluid-structure interaction problem is relevant to the quieting design of flow ducts where the thin duct wall panels are directly in contact with a flowing fluid. The unsteady pressure arising from flow and/or acoustics may excite the flexible panel to vibrate which re-radiate acoustic wave. Evidently there is a strong coupling between the aeroacoustics of the fluid and the structural dynamics of the panel. This phenomenon may be utilized to control noise, if the re-generated wave can be adjusted to cancel the noise. It is necessary to get a better understanding of the nonlinear aeroacoustic-structural coupling in the design of effective flow duct noise control. The present paper reports an investigation of acoustic-structural interaction of flexible panels in a flow duct. The problem is solved by a time-domain numerical methodology which is able to calculate the nonlinear fluid-structure interaction experienced by the flexible panels and their acoustic-structural response correctly. A discussion of the acoustic-structural response with and without mean flow is given.
Original languageEnglish
Title of host publication21st International Congress on Sound and Vibration 2014, ICSV 2014
PublisherInternational Institute of Acoustics and Vibrations
Pages4694-4701
Number of pages8
Volume6
ISBN (Electronic)9781634392389
Publication statusPublished - 1 Jan 2014
Event21st International Congress on Sound and Vibration 2014, ICSV 2014 - Beijing, China
Duration: 13 Jul 201417 Jul 2014

Conference

Conference21st International Congress on Sound and Vibration 2014, ICSV 2014
Country/TerritoryChina
CityBeijing
Period13/07/1417/07/14

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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