Abstract: | Some results are presented of experimental studies of the equilibrium temperature and heat transfer of a sphere in a supersonic rarefied air flow.The notations D sphere diameter - u, , T,,l, freestream parameters (u is velocity, density, T the thermodynamic temperature,l the molecular mean free path, the viscosity coefficient, the thermal conductivity) - T0 temperature of the adiabatically stagnated stream - Te mean equilibrium temperature of the sphere - Tw surface temperature of the cold sphere (Twe) - mean heat transfer coefficient - e air thermal conductivity at the temperature Te - P Prandtl number - M Mach number |