The effect of walls on instability waves in supersonic shear layers

P. J. Morris, M. G. Giridharan

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


A spatial stability analysis is performed to determine the effect of wall placement on instability waves in confined supersonic shear layers. It is shown that the growth rates of Kelvin-Helmholtz instability waves are independent of wall height. However, supersonic instability waves are found to exhibit peaks and valleys in their growth rate curve as a result of the reinforcement and cancellation of the reflected Mach waves at the shear layer. Finally, it is shown how the instability growth rates in a ducted shear layer may be maximized by the proper choice of the duct width to height ratio.

Original languageEnglish (US)
Pages (from-to)356-358
Number of pages3
JournalPhysics of Fluids A
Issue number2
StatePublished - 1991

All Science Journal Classification (ASJC) codes

  • Engineering(all)


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