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Preliminary results of buffet tests in a cryogenic wind tunnelBuffet tests of two wings with different leading-edge sweep show that it is feasible to use the standards wing root bending moment technique in a cryogenic wing tunnel. The results for the 65 deg sweep delta wing indicate the importance of matching the reduced frequency parameter in model tests for planforms which are sensitive to reduced frequency parameter if quantitative buffet measurements are required. The unique ability of a pressurized cryogenic wind tunnel to separate the effects of Reynolds number and of aeroelastic distortion by variations in the tunnel stagnation temperature and pressure was demonstrated.
Document ID
19810022582
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Boyden, R. P. (NASA Langley Research Center Hampton, VA, United States)
Johnson, W. G., Jr. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
July 1, 1981
Subject Category
Aerodynamics
Report/Patent Number
NASA-TM-81923
Accession Number
81N31124
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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