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RESEARCH PAPERS

Toward Attenuation of Self-Sustained Oscillations of a Turbulent Jet Through a Cavity

[+] Author and Article Information
H. Karadogan, D. Rockwell

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, Pa. 18015

J. Fluids Eng 105(3), 335-340 (Sep 01, 1983) (6 pages) doi:10.1115/1.3241000 History: Received May 07, 1982; Online October 26, 2009

Abstract

Several attenuation configurations are assessed, involving the following concepts: generating streamwise vorticity, dephasing the azimuthal coherence of the jet, and reducing rigidity of the jet separation edge. By proper design, effective attenuation of the discrete frequency components of the oscillation can be achieved. For cases where there is not complete attenuation, the phase condition corresponding to maximum relative amplitude of the oscillation is maintained, the disturbance phase speed is essentially unaltered, and there is a proportional reduction in amplitude along the jet, including the initial fluctuation level at separation.

Copyright © 1983 by ASME
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