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Results of an experimental investigation of the heating of the surface of a blunt plate, made of a material having a low heat conductivity, in a wind tunnel in the regime of strong viscous-nonviscous interaction of the boundary layer on the surface of the plate with the incident fluid flow are presented. It is shown that the installation of a wedge on this plate in the vicinity of its trailing edge changes the disturbed flow region and the temperature distribution over the surface of the plate upstream of the wedge as far as the leading edge of the plate. [ABSTRACT FROM AUTHOR]

The heating of the surface of a blunted plate made of a material with low thermal conductivity is experimentally investigated in a wind tunnel under the strong interaction regime. The flow in the boundary layer on the plate is nonstationary, since the temperature of the plate surface continuously increases during the start-up, and its distribution over the surface is variable. The installation of a wedge in the vicinity of the trailing edge of the plate leads to changes in the area of the perturbed flow and in the temperature distribution on the surface of the plate in front of it up to the leading edge as compared to the case of flow around a plate without a wedge. These changes are explained by the propagation of pressure perturbations caused by the installation of the wedge along the subsonic part of the boundary layer against the flow. [ABSTRACT FROM AUTHOR]

The results of an experimental wind-tunnel investigation of the plate surface heating in the strong viscous-inviscid interaction regime are presented. It is shown that In the presence of a wedge mounted in the vicinity of the trailing edge of the plate the temperature distribution over the plate surface ahead of the wedge considerably changes up to the leading edge, as compared with the case of flow past the same plate in the absence of the wedge. The boundary layer flow is not steady, since during the run the surface temperature grows continuously, the temperature distribution itself along the plate surface being variable. It is established that in an unsteady boundary layer the upwind propagation of pressure disturbances produced by a thin wedge is fundamentally different in nature from the disturbance propagation in the case of flow past a plate with a constant surface temperature. [ABSTRACT FROM AUTHOR]