Observation of laminar flow on a blunted 15 degree cone-cylinder in free flight at high reynolds numbers and free-stream mach numbers to 8.17

Disher, John H Rabb, Leonard
naca-rm-e56g23
October 15, 1956


A highly polished 15 degree included-angle cone-cylinder with hemispherical tip has been flown to obtain boundary-layer transition and heat-transfer data. The model was launched from a carrier plane at an altitude of 47,500 feet. Laminar flow existed at a Reynolds number greater than 38.5 x 10(exp) 6 on the cylinder when the model was at the peak free-stream Mach number of 8.17. The results indicate an appreciable and favorable effect of tip bluntness in raising the allowable skin temperature for a given boundary-layer transition Reynolds number.

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