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RESEARCH PAPERS

Effect of Nonaxisymmetric Forcing on a Swirling Jet With Vortex Breakdown

[+] Author and Article Information
Ismet Gursul

Department of Mechanical, Industrial and Nuclear Engineering, University of Cincinnati, Cincinnati, OH 45221-0072

J. Fluids Eng 118(2), 316-321 (Jun 01, 1996) (6 pages) doi:10.1115/1.2817379 History: Received July 24, 1995; Revised February 06, 1996; Online December 04, 2007

Abstract

Nonaxisymmetric forcing was applied to the vortex breakdown flowfield of a strongly swirling jet and its effects were investigated experimentally. It is shown that the spreading rate of the jet can be increased due to the excitation of the helical mode instability of the breakdown flowfield. This can be achieved for extremely low amplitudes of excitation.

Copyright © 1996 by The American Society of Mechanical Engineers
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