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Title: Acoustic-structural interaction of flexible walls in a flow duct
Authors: Fan, HKH
Leung, RCK 
Lam, GCY
Li, KH
Issue Date: 2014
Source: 21st International Congress on Sound and Vibration 2014, ICSV 2014, 2014, v. 6, p. 4694-4701
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.
Publisher: International Institute of Acoustics and Vibrations
ISBN: 9.78E+12
Description: 21st International Congress on Sound and Vibration 2014, ICSV 2014, Beijing, 13-17 July 2014
Appears in Collections:Conference Paper

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