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Reduction of background noise induced by wind tunnel jet exit vanesThe NASA-Langley 4 x 7 m wind tunnel develops low frequency flow pulsations at certain velocity ranges during open throat mode operation, affecting the aerodynamics of the flow and degrading the resulting model test data. Triangular vanes attached to the trailing edge of flat steel rails, mounted 10 cm from the inside of the jet exit walls, have been used to reduce this effect; attention is presently given to methods used to reduce the inherent noise generation of the vanes while retaining their pulsation reduction features.
Document ID
19850066401
Document Type
Reprint (Version printed in journal)
Authors
Martin, R. M. (NASA Langley Research Center Hampton, VA, United States)
Brooks, T. F. (NASA Langley Research Center Hampton, VA, United States)
Hoad, D. R. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 12, 2013
Publication Date
October 1, 1985
Publication Information
Publication: AIAA Journal
Volume: 23
ISSN: 0001-1452
Subject Category
ACOUSTICS
Distribution Limits
Public
Copyright
Other