Effect of the slot depth on supersonic boundary-layer stabilization
V.I. Lysenko, B.V. Smorodsky, A.D. Kosinov, A.A. Yatskikh
Khristianovich Institute of Theoretical and Applied Mechanics SB RAS, Novosibirsk, Russia
Keywords: compressible boundary layer, hydrodynamic stability, slot
Abstract
Influence of streamwise slots with the orientation angle φ = 0 and various depths h (corresponding Reynolds number Reh = 0 -2000) on the stability of the supersonic (M = 2) flat-plate boundary layer with relation to natural disturbances of the first (vorticity) instability mode driving laminar-turbulent transition was investigated experimentally. Experiments shown that such kind of disturbances can be stabilized by small-depth streamwise slots, wherein the maximum stabilization occurs at the Reynolds number (based on the slot depth) of about Reh ≈ 1000.
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