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Numerical simulation of self-excited oscillations in a ramjet inlet-diffuser flowThis paper describes numerical simulations of self-excited oscillations in a two-dimensional transonic inlet-diffuser flow by solving the Navier-Stokes equations with a two-equation turbulence model. The calculated amplitudes of oscillations for the terminal shock and the velocity fields compare well with experimental measurements; however, the predicted frequency of oscillations is about 50 percent higher. The formation of a pair of downstream-traveling, counter-rotating vortices at each cycle of velocity fluctuations, as reported experimentally, is vividly revealed by the numerical results.
Document ID
19860026877
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Hsieh, T.
(U.S. Navy, Naval Surface Weapons Center Silver Spring, MD, United States)
Coakley, T.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 12, 2013
Publication Date
January 1, 1985
Subject Category
Aerodynamics
Accession Number
86A11615
Distribution Limits
Public
Copyright
Other

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