Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/11085
Title: Vortex sound generation due to a flow impedance discontinuity on a flat surface
Authors: Tang, SK 
Li, KM
Issue Date: 2001
Publisher: Acoustical Society of America
Source: Journal of the Acoustical Society of America, 2001, v. 109, no. 4, p. 1334-1341 How to cite?
Journal: Journal of the Acoustical Society of America 
Abstract: The sound generated by the unsteady motion of a vortex filament moving over a flat boundary with a sharp flow impedance discontinuity is studied theoretically. Theoretical results show that the vortex filament undergoes significant accelerating or decelerating motions and radiates sound at the instant when it moves across the plane of impedance discontinuity. The accelerations and decelerations of the vortex filament are shown to be the major mechanisms of sound generation. The sound so produced has a large low-frequency content such that the change in the flow impedance affects only the sound generation process but not the subsequent sound propagation to the far field.
URI: http://hdl.handle.net/10397/11085
ISSN: 0001-4966
EISSN: 1520-8524
DOI: 10.1121/1.1349186
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