6. Physics of a Fluid, Neutral and Ionized Gases

THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE FIRST INSTABILITY MODE DEVELOPMENT IN SUPERSONIC BOUNDARY LAYERS ON POROUS COATINGS

Sergey A. Gaponov
1. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
gaponov@itam.nsc.ru
Yuri G. Yermolaev
1. Khristianovich Institute of Theoretical and Applied Mechanics SB RAS Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
yermol@itam.nsc.ru
Aleksandr D. Kosinov
1. Khristianovich Institute of Theoretical and Applied Mechanics of the Siberian Branch of the Russian Academy of Sciences Novosibirsk, Russian Federation
2. Novosibirsk State University Novosibirsk, Russian Federation
kosinov@itam.nsc.ru
The material was received by the Editorial Board: 21.04.2014
In the present study we have performed combined theoretical and experimental investigation of the surface permeability influence on the linear stability of the supersonic flat-plate boundary layer at free-stream Mach number M = 2. Good quantitative agreement was obtained between the data calculated by the linear theory of stability and the data obtained in experiments with artificially generated disturbances performed on models with various porous inserts. It is shown that increase of the permeable surface pore size leads to the destabilization of the first instability modes propagating under arbitrary angles in the boundary layer.

Keywords:
supersonic boundary layer, instability, laminar-turbulent transition, permeable coating. 
УДК 532.526

THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE FIRST INSTABILITY MODE DEVELOPMENT IN SUPERSONIC BOUNDARY LAYERS ON POROUS COATINGS  
References: Gaponov S. A., Ermolaev Yu. G., Kosinov A. D., Lysenko V. I., Semionov N. V., Smorodsky B. V. THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE FIRST INSTABILITY MODE DEVELOPMENT IN SUPERSONIC BOUNDARY LAYERS ON POROUS COATINGS . Vestnik NSU. Series: Physics. 2014, vol. 9, no. 2. P. 65–74 (in Russ.). DOI: 10.54362/1818-7919-2014-9-2-65-74