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The effect of walls on a spatially growing supersonic shear layer

Zhuang, Mei and Dimotakis, Paul E. and Kubota, Toshi (1990) The effect of walls on a spatially growing supersonic shear layer. Physics of Fluids A, 2 (4). pp. 599-604. ISSN 0899-8213. http://resolver.caltech.edu/CaltechAUTHORS:ZHUpofa90

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Abstract

The inviscid instability, with respect to supersonic disturbances of a spatially growing plane mixing layer inside parallel flow guide walls, is investigated using linear stability analysis. For supersonic convective Mach numbers, it is found that the maximum amplification rates of the shear layers approach an asymptotic value and that this maximum amplification rate increases to its maximum value and decreases again as the distance between the walls decreases continuously. Contour plots of the pressure perturbation fields indicate that there are waves propagating outward from the shear layer along the Mach angle, and that the walls provide a feedback mechanism between the growing shear layer and this compression/expansion wave system. The streak lines of the flow confirm that the spreading rate of the shear layer is unusually small for supersonic disturbances.


Item Type:Article
Additional Information:Copyright © 1990 American Institute of Physics (Received 9 August 1989; accepted 22 December 1989) This research was supported by the Air Force Office of Scientific Research, Grant No. AFOSR-88-0155.
Subject Keywords:SUPERSONIC FLOW; WALLS; SHEAR FLOW; LAYERS; IDEAL FLOW; MIXING; PLANAR CONFIGURATION; DISTURBANCES; INSTABILITY; CONVECTION; MACH NUMBER; ASYMPTOTIC SOLUTIONS; COMPRESSIBLE FLOW; FLUIDS
Record Number:CaltechAUTHORS:ZHUpofa90
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:ZHUpofa90
Alternative URL:http://dx.doi.org/10.1063/1.857760
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6399
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:07 Dec 2006
Last Modified:26 Dec 2012 09:20

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