Experimental study of free-shear layer transition above a cavity at Mach 3.5The transition behavior of a free-shear layer above a cavity with high and low levels of freestream acoustic disturbances has been studied at Mach 3.5. Optical techniques, mean pitot pressure measurements, and hot-wire measurements were employed to detect transition locations. Transition Reynolds numbers of between 363,000 and 530,000 were found, in agreement with previous results. It is suggested that upstream convected disturbances may be at least partially responsible for the insensitivity of transition Reynolds numbers to the freestream acoustic disturbance field.
Document ID
19890054672
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
King, Rudolph A. (NASA Langley Research Center Hampton, VA, United States)
Creel, Theodore R., Jr. (NASA Langley Research Center Hampton, VA, United States)
Bushnell, Dennis M. (NASA Langley Research Center Hampton, VA, United States)