Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/25341
Title: Vortex sound under the influence of a piecewise porous material on an infinite rigid plane
Authors: Lau, CK
Tang, SK 
Issue Date: 2007
Source: Journal of the Acoustical Society of America, 2007, v. 122, no. 5, p. 2542-2550
Abstract: The vortex dynamics and the sound generation by an inviscid vortex in the presence of a finite length porous material on an otherwise rigid plane are studied numerically in the present study in an attempt to understand the sound generation near the surface of a wall lining in a lined duct. The combined effects of the effective fluid density and flow resistance inside the porous material, and the length and thickness of the porous material on the sound generation process are examined in detail. Results obtained demonstrate the sound pressure is longitudinal dipole and show how seriously the above-mentioned parameters are affecting the vortex sound pressure under the influence of the porous material.
Publisher: Acoustical Society of America
Journal: Journal of the Acoustical Society of America 
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.2783201
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