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https://hdl.handle.net/2440/69169
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Type: | Journal article |
Title: | On the aeroacoustic tonal noise generation mechanism of a sharp-edged plate |
Author: | Moreau, D. Brooks, L. Doolan, C. |
Citation: | Journal of the Acoustical Society of America, 2011; 129(4):EL154-EL160 |
Publisher: | Acoustical Society of America American Institute of Physics |
Issue Date: | 2011 |
ISSN: | 0001-4966 1520-8524 |
Statement of Responsibility: | Danielle J. Moreau, Laura A. Brooks, and Con J. Doolan |
Abstract: | This letter presents an experimental study on the tonal noise generated by a sharp-edged flat plate at low-to-moderate Reynolds number. Flow and far-field noise data reveal that, in this particular case, the tonal noise appears to be governed by vortex shedding processes. Also related to the existence of the tonal noise is a region of separated flow slightly upstream of the trailing edge. Hydrodynamic fluctuations at selected vortex shedding frequencies are strongly amplified by the inflectional mean velocity profile in the separated shear layer. The amplified hydrodynamic fluctuations are diffracted by the trailing edge, producing strong tonal noise. |
Keywords: | acoustic noise aeroacoustics hydrodynamics plates (structures) structural acoustics |
Rights: | © 2011 Acoustical Society of America |
DOI: | 10.1121/1.3565472 |
Grant ID: | http://purl.org/au-research/grants/arc/DP1094015 |
Published version: | http://dx.doi.org/10.1121/1.3565472 |
Appears in Collections: | Aurora harvest Environment Institute publications Mechanical Engineering publications |
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