INVESTIGATION OF HEAT TRANSFER IN BASE TYPE SUPERSONIC LAMINAR AND TRANSITIONAL SEPARATED FLOWS

Abstract

Abstract : Heat transfer rate distributions were measured in the separated regions of a two-dimensional backward facing step, an axially symmetric backward facing step, a blunt two-dimensional base, a sharp protruding two-dimensional leading edge and in the leading edge bubble over the surface of a flat nosed two-dimensional model. The results of these measurements are compared with measurements of heat transfer rates in various base type separated flows obtained in various wind tunnels and to a calculation of heat transfer behind a backward facing step based on the integral method. In most of these investigations a high peak in the heat transfer rate is found to occur in the reattachment zone. Maximum heat transfer rate values of up to 10 times the flat plate heat transfer rate are reported in various investigations. An inverse relation between the value of the peak heat transfer rate and the distance between the separation point to the position of the maximum heating in the reattachment zone is shown to exist.