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Observations of dynamic stall phenomena using liquid crystal coatingsNovel, shear stress-sensitive/temperature-insensitive liquid crystal coatings have been applied to the surface of an oscillating airfoil in order to ascertain the unsteady fluid physics associated with the dynamic-stall process. Surface microtufts and laser sheet/smoke-particle flow visualization were used to compare the liquid-crystal results. Boundary-layer transition and turbulent separation locations were measured as a function of geometric angle of attack. The results obtained are compared with Eppler (1980) aerodynamic design code predictions.
Document ID
19910043297
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Reda, Daniel C.
(NASA Ames Research Center Moffett Field, CA; Sandia National Laboratories, Albuquerque, NM, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1991
Publication Information
Publication: AIAA Journal
Volume: 29
ISSN: 0001-1452
Subject Category
Instrumentation And Photography
Accession Number
91A27920
Distribution Limits
Public
Copyright
Other

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