Effects of compressibility and free-stream turbulence on boundary layer transition in high-subsonic and transonic flowsBased on the existing boundary layer transition data, the effects of compressibility, pressure fluctuations, and free-stream turbulence have been reexamined for subsonic and transonic flow speeds. It is confirmed that the compressibility effects may be adequately expressed in terms of a simple correlation with free-stream Mach number. Pressure fluctuations, especially at low levels, do not seem to significantly affect the transition phenomenon. Effects of free-stream turbulence in high-subsonic and transonic flows are similar to the trends observed for low-speed flows and the transition process is hastened. The trends, as seen from slender cone flow data, seem to suggest power law correlations between transition Reynolds number and free-stream turbulence.
Document ID
19860040011
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Murthy, S. V. (University of the Pacific Stockton, CA, United States)
Steinle, F. W. (NASA Ames Research Center Moffett Field, CA, United States)