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High-intensity tone generation by aeroacoustic sourcesAn experimental investigation has been carried out on the production of high-intensity tones by axisymmetric ring cavities. Maximum sound production occurs during an acoustic resonance at Strouhal numbers, which depend only on the local flow velocity independent of cavity location. Values of sound pressure of about 115 dB at 1-m distance can be generated by axisymmetric ring cavities on projectiles moving at a relatively low flight speed equal to 70 m/s. Frequencies in the audible range up to several kilohertz can be generated aeroacoustically. A simple analytical model has been developed to explain the experimental observations.
Document ID
19880035829
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Shakkottai, P.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Kwack, E. Y.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Cho, Y. I.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Back, L. H.
(California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1987
Publication Information
Publication: Acoustical Society of America, Journal
Volume: 82
ISSN: 0001-4966
Subject Category
Acoustics
Accession Number
88A23056
Distribution Limits
Public
Copyright
Other

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