Joint permeability and roughness effect on the supersonic flat-plate boundary layer stability and transition

The joint effect of the permeability and the roughness of the flat plate surface on the boundary layer stability and laminar-turbulent transition is experimentally and theoretically investigated at the freestream Mach number M ∞ = 2. It is shown that, as a certain roughness value is reached, and wit...

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Published inFluid dynamics Vol. 49; no. 5; pp. 608 - 613
Main Authors Ermolaev, Yu. G., Kosinov, A. D., Lysenko, V. I., Semenov, N. V., Smorodskii, B. V.
Format Journal Article
LanguageEnglish
Published Moscow Pleiades Publishing 01.09.2014
Subjects
Boundary layer stability
Classical and Continuum Physics
Classical Mechanics
Computational fluid dynamics
Displacement
Disturbances
Engineering Fluid Dynamics
Flat plates
Fluid- and Aerodynamics
Leading edges
Permeability
Physics
Physics and Astronomy
Roughness
hydrodynamic stability
roughness
porosity
compressible boundary layer
laminar-turbulent transition
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Summary:The joint effect of the permeability and the roughness of the flat plate surface on the boundary layer stability and laminar-turbulent transition is experimentally and theoretically investigated at the freestream Mach number M ∞ = 2. It is shown that, as a certain roughness value is reached, and with increase in the porous coating thickness (on a certain range), the boundary layer stability against natural disturbances diminishes and laminar-turbulent transition is displaced toward the leading edge of the model.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0015-4628
1573-8507
DOI:10.1134/S001546281405007X