In-flight off-surface flow visualization using infrared imagingA light test investigation was conducted to evaluate an infrared (IR) imaging technique to visualize off-surface flow phenomena. A single-engine, general-aviation airplane was equipped with an IR imaging system that viewed the region around the left wingtip. Vortical flow at the wingtip was seeded with surfur hexafluoride, a gas with strong infrared absorbing and emitting characteristics. Different terrain and sky backgrounds were evaluated for their effect on IR images of vortical flow. The best IR images were obtained with a clear background. The results of the investigation indicate that IR flow visualization compliments existing smoke generator methods for off-surface flow visualization.
Document ID
19910068316
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Manuel, Gregory S. (NASA Langley Research Center Hampton, VA, United States)
Daryabeigi, Kamran (NASA Langley Research Center Hampton, VA, United States)
Alderfer, David W. (NASA Langley Research Center Hampton, VA, United States)
Obara, Clifford J. (NASA Langley Research Center Hampton, VA, United States)