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A Model for the Onset of Vortex BreakdownA large body of information exists on the breakdown of incompressible streamwise vortices. Less is known about vortex breakdown at high speeds. An interesting example of supersonic vortex breakdown is the breakdown induced by the interaction of vortices with shock waves. The flow in supersonic engine inlets and over high-speed delta wings constitute technologically important examples of this phenomenon, which is termed 'shock-induced vortex breakdown'. In this report, we propose a model to predict the onset of shock-induced vortex breakdown. The proposed model has no adjustable constants, and is compared to both experiment and computation. The model is then extended to consider two other problems: the breakdown of a free compressible vortex, and free incompressible vortex breakdown. The same breakdown criterion is used in all three problems to predict the onset of breakdown. Finally, a new breakdown map is proposed that allows the simultaneous comparison of data from flows ranging from incompressible breakdown to breakdown induced by a shock wave.
Document ID
Acquisition Source
Ames Research Center
Document Type
Reprint (Version printed in journal)
Mahesh, K.
(Stanford Univ. Stanford, CA United States)
Date Acquired
August 17, 2013
Publication Date
December 1, 1996
Publication Information
Publication: Annual Research Briefs - 1996
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
Funding Number(s)
CONTRACT_GRANT: F49620-92-J-0128
Distribution Limits
Work of the US Gov. Public Use Permitted.
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