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A multiple-scales model of the shock-cell structure of imperfectly expanded supersonic jetsThe present investigation is concerned with the development of an analytical model of the quasi-periodic shock-cell structure of an imperfectly expanded supersonic jet. The investigation represents a part of a program to develop a mathematical theory of broadband shock-associated noise of supersonic jets. Tam and Tanna (1982) have suggested that this type of noise is generated by the weak interaction between the quasi-periodic shock cells and the downstream-propagating large turbulence structures in the mixing layer of the jet. In the model developed in this paper, the effect of turbulence in the mixing layer of the jet is simulated by the addition of turbulent eddy-viscosity terms to the momentum equation. Attention is given to the mean-flow profile and the numerical solution, and a comparison of the numerical results with experimental data.
Document ID
19850067203
Document Type
Reprint (Version printed in journal)
Authors
Tam, C. K. W. (Florida State Univ. Tallahassee, FL, United States)
Jackson, J. A. (Florida State University Tallahassee, United States)
Seiner, J. M. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 153
ISSN: 0022-1120
Subject Category
FLUID MECHANICS AND HEAT TRANSFER
Funding Number(s)
CONTRACT_GRANT: NAG3-182
Distribution Limits
Public
Copyright
Other