Some Effects of Roughness on Stagnation-point Heat Transfer at a Mach Number of 2, a Stagnation Temperature of 3,530 Degrees F, and a Reynolds Number of 2.5 x 10(exp 6) Per Foot

Report presenting an investigation to determine some effects of surface roughness on heat transfer at the stagnation point. Testing occurred in the ceramic-heated jet laboratory model at a Mach number of 2, a stagnation temperature of 3,530 degrees Fahrenheit, and a stream Reynolds number of 2.5 x 10(exp 6) per foot. Results regarding the variation of stagnation-point heat-transfer coefficient with surface roughness, heat transfer at the stagnation point of a hemisphere, and heat-transfer coefficient are provided.