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Effects of high subsonic flow on sound propagation in a variable-area ductThe propagation of sound in a converging-diverging duct containing a quasi-one-dimensional steady flow with a high subsonic throat Mach number was studied. The behavior of linearized acoustic theory at the throat of the duct was shown to be singular. This singularity implies that linearized acoustic theory is invalid. The explicit singular behavior was determined and used to sketch the development (by the method of matched asymptotic expansions) of a nonlinear theory for sound propagation in a sonic throat region.
Document ID
19770003367
Document Type
Conference Paper
Authors
Callegari, A. J.
(New York Univ. New York, NY, United States)
Myers, M. K.
(George Washington Univ. Washington, D. C., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Publication Information
Publication: NASA. Langley Res. Center Advan. in Eng. Sci., Vol. 3
Subject Category
Acoustics
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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IDRelationTitle19770003363Analytic PrimaryAdvances in Engineering Science, Volume 3