Results of theoretical investigation of characteristics of the supersonic Mach=2 flat-plate boundary-layer under conditions of surface sublimation in the flow of air are presented. Naphthalene (C_(10)H_8) was used as a sublimation material. Calculations found that with increasing surface temperature mass flow rate of naphthalene evaporation also increases. This leads to the wall temperature decrease in comparison with the case of a flow past a flat-plate without sublimation. Large molecular weight of naphthalene compared with molecular weight of air and lowering of the surface temperature as a result of the wall material evaporation leads to an increase in the density of the binary mixture (air and subliming vapors) near the wall. The performed linear stability computations show that such a change in the boundary layer profiles leads to a considerable reduction of the local linear perturbations growth rates. This means an increase of the boundary layer stability leading to transition delay.
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