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Linear Stability Regime Analysis of the Compressible Reacting Mixing LayerPrevious investigations have shown that a compressible reacting mixing layer can develop two peaks in the mean density weighted vorticity profile. Linear stability analyses show that at these peaks two distinct 'outer' instability modes appear in addition to the more common central mode, which exists unaccompanied in incompressible nonreacting flows. The present study parametrically analyzes the effects of compressibility, heat release, stoichiometry, and density ratio on the amplification rate and obliquity of each stability mode. The mean profiles used in the spatial stability calculation are generated by self-similar solutions of the compressible boundary layer equations combined with the assumption of infinitely fast chemistry. It is shown that the influence of stoichiometry and density ratio on the peaks of the density weighted vorticity profile determines which modes will dominate. Of particular interest are the conditions where two modes are equally amplified, causing the mixing layer to develop into a 'colayer' structure.
Document ID
20020034623
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Day, M. J.
(Stanford Univ. Stanford, CA United States)
Reynolds, William C.
(Stanford Univ. Stanford, CA United States)
Mansour, N. N.
(NASA Ames Research Center Moffett Field, CA United States)
Rai, Man Mohan
Date Acquired
August 20, 2013
Publication Date
January 1, 1995
Subject Category
Fluid Mechanics And Thermodynamics
Meeting Information
Meeting: DFD95 Meeting of the American Physical Society
Location: Irvine, CA
Country: United States
Start Date: November 19, 1995
End Date: November 21, 1995
Sponsors: American Physical Society
Funding Number(s)
CONTRACT_GRANT: F49620-94-1-0152
PROJECT: RTOP 505-59-53
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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