Optical boundary-layer transition detection in a transonic wind tunnelA high-sensitivity interferometer has been developed and used to detect boundary-layer transitions over a symmetric airfoil. The tests, which included both natural and roughness-induced transitions, were performed in a transonic wind tunnel. The measurements showed a peak amplitude rms and higher energy in the spectrum of the signal associated with transition. The tests revealed that the interferometer system can be used to locate the transition region over three-dimensional aerodynamic models.
Document ID
19870055178
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Azzazy, M. (Spectron Development Labs., Inc. Costa Mesa, CA, United States)
Modarress, D. (Spectron Development Laboratories, Inc. Costa Mesa, CA, United States)
Hall, R. M. (NASA Langley Research Center Hampton, VA, United States)