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Sound Generation by Flow over a Two-Dimensional CavitySound generated by flow over a cavity at a Mach number of 0.1 and a Reynolds number based on cavity length of 5000 is calculated. The computation utilizes a two part technique where the time-dependent incompressible flow is first obtained and then a second calculation is performed for the compressible aspects of the flow. This second calculation utilizes a grid and numerical scheme designed for resolution of acoustic waves. The cavity flowfield is observed to oscillate quite regularly at the Strouhal number of 0.58 which produces an acoustic source of the same frequency. Time histories, spectra, and directivity of the sound radiation are computed.
Document ID
19970011200
Acquisition Source
Langley Research Center
Document Type
Reprint (Version printed in journal)
Authors
Hardin, Jay C.
(NASA Langley Research Center Hampton, VA United States)
Pope, D. Stuart
(Lockheed Engineering and Sciences Co. Hampton, VA United States)
Date Acquired
August 17, 2013
Publication Date
March 1, 1995
Publication Information
Publication: AIAA Journal
Publisher: The American Institute of Aeronautics and Astronautics
Volume: 33
Issue: 3
Subject Category
Acoustics
Report/Patent Number
NASA-TM-111776
NAS 1.15:111776
Accession Number
97N70764
Distribution Limits
Public
Copyright
Public Use Permitted.
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