Forebody Convective Hypersonic Heat Transfer Measurements over Large-Angle Blunt Cones

Abstract

The forebody surface convective heat transfer rates over large-angle blunt cones measured at a Mach number of 5.75 are presented. The surface heating rates in the stagnation zone of the blunt cone increase by fivefold when the stagnation enthalpy is doubled. The windward corner heating is approx. 50-60% of the maximum heating rate measured on the blunt cone at 15-deg angle of incidence. The corner bluntness reduces the heat transfer in the corner of the blunt cone by about 10-20%. Slightly higher heating rates are measured in a carbon dioxide environment compared to air as the test gas. These results are used to develop an approximate analytical model for estimating the heating rate distributions over the large-angle blunt cone. The experimental results are also compared with numerical solutions computed using axisymmetric N-S solutions.