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2011.78: Theoretical analysis of acoustic instability of a hypersonic shock layer on a porous wall

2011.78: Dmitry Yumashev and Alexander Fedorov (2005) Theoretical analysis of acoustic instability of a hypersonic shock layer on a porous wall. Journal of Applied Mechanics and Technical Physics, 46 (1). pp. 33-41.

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DOI: 10.1007/s10808-005-0029-1

Abstract

The possibility of controlling the laminar–turbulent transition in hypersonic shock layers by means of porous coatings is considered. The linear stability of the shock layer to acoustic disturbances is analyzed. A dispersion relation is derived in an analytical form and analyzed for different characteristic values of porosity of the wall, which allows one to study the spectrum of acoustic disturbances in the shock layer. Analytical expressions for the growth rate of instability of acoustic disturbances are presented as functions of the reflection factor. Their structure indicates that the porous coating effectively decreases acoustic instability of the shock layer.

Item Type:Article
Uncontrolled Keywords:laminar–turbulent transition, hypersonic shock layer, acoustic disturbances, stability
Subjects:PACS 2003 > 47 Fluid dynamics
MIMS number:2011.78
Deposited By:Dr Dmitry Yumashev
Deposited On:08 October 2011

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