Experimental Rarefied Heat Transfer at Hypersonic Conditions over 70-Degree Blunted Cone

Surface heat transfer rates have been measured over a 70-deg spherically blunted cone chosen as a test case model to provide both experimental and computational databases. Under raree ed and hypersonic conditions, heating rate distributions are measured along the model and presented at angles of attack varying from 0 to 30 deg. Experiments have been conducted in the SR3 facility at a freestream Mach number close to 20. Three e ow rarefactions have been considered, which correspond to Reynolds numbers of 1420, 4175, and 36,265. Reynolds numbers are calculated using freestream conditions and the model base diameter. In parallel to the experimental work, e ow calculations were executed by an international group of researchers for identical test conditions. Comparisons between experimental and computational heating rates are also presented.