Joint permeability and roughness effect on the supersonic flat-plate boundary layer stability and transition |
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Authors: | Yu G Ermolaev A D Kosinov V I Lysenko N V Semenov B V Smorodskii |
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Institution: | 1. Khristianovich Institute of Theoretical and Applied Mechanics, ul. Institutskaya 4/1, Novosibirsk, 630090, Russia
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Abstract: | 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. |
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