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Excitation of instability waves in a two-dimensional shear layer by soundThe excitation of instability waves in a plane compressible shear layer by sound waves is studied. The problem is formulated mathematically as an inhomogeneous boundary-value problem. A general solution for abitrary incident sound wave is found by first constructing the Green's function of the problem. Numerical values of the coupling constants between incident sound waves and excited instability waves for a range of flow Mach number are calculated. The effect of the angle of incidence in the case of a beam of acoustic waves is analyzed. It is found that for moderate subsonic Mach numbers a narrow beam aiming at an angle between 50 to 80 deg to the flow direction is most effective in exciting instability waves.
Document ID
19790034839
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Tam, C. K. W.
(Florida State University Tallahassee, Fla., United States)
Date Acquired
August 9, 2013
Publication Date
November 28, 1978
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 89
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
79A18852
Funding Number(s)
CONTRACT_GRANT: NSG-1329
Distribution Limits
Public
Copyright
Other

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