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Application of a laser interferometer skin-friction meter in complex flowsThe application of a nonintrusive laser-interferometer skin-friction meter, which measures skin friction with a remotely located laser interferometer that monitors the thickness change of a thin oil film, is extended both experimentally and theoretically to several complex wind-tunnel flows. These include two-dimensional seperated and reattached subsonic flows with large pressure and shear gradients, and two and three-dimensional supersonic flows at high Reynolds number, which include variable wall temperatures and cross-flows. In addition, it is found that the instrument can provide an accurate location of the mean reattachment length for separated flows. Results show that levels up to 120 N/sq m, or 40 times higher than previous tests, can be obtained, despite encountering some limits to the method for very high skin-friction levels. It is concluded that these results establish the utility of this instrument for measuring skin friction in a wide variety of flows of interest in aerodynamic testing.
Document ID
19830029857
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Monson, D. J.
(NASA Ames Research Center Moffett Field, CA, United States)
Driver, D. M.
(NASA Ames Research Center Moffett Field, CA, United States)
Szodruch, J.
(NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
August 11, 2013
Publication Date
January 1, 1981
Subject Category
Instrumentation And Photography
Meeting Information
Meeting: ICIASF ''81; International Congress on Instrumentation in Aerospace Simulation Facilities
Location: Dayton, OH
Start Date: September 30, 1981
Accession Number
83A11075
Distribution Limits
Public
Copyright
Other

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