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A new multipoint thin-film diagnostic technique for fluid dynamic studiesA multielement hot-film sensor has been developed with closely-spaced elements (2.5 mm) in the streamwise direction. In addition to boundary-layer transition detection, the output of these sensors can reveal the locations of boundary-layer separation and reattachment by a 180 deg phase difference in the 0-200-Hz frequency bandwidth between sensor elements on each side of either the separation or reattachment point. This paper describes the features of multielement hot-film sensor arrays and discusses results from their application to a number of low-speed and transonic airfoil tests.
Document ID
19890057879
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sewall, W. G. (NASA Langley Research Center Hampton, VA, United States)
Stack, J. P. (NASA Langley Research Center Hampton, VA, United States)
Mcghee, R. J. (NASA Langley Research Center Hampton, VA, United States)
Mangalam, S. M. (Analytical Services and Materials, Inc. Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
October 1, 1988
Subject Category
Instrumentation And Photography
Report/Patent Number
SAE PAPER 881453
Report Number: SAE PAPER 881453
Accession Number
89A45250
Distribution Limits
Public
Copyright
Other

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