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Effect of jet exit vanes on flow pulsations in an open-jet wind tunnelAn investigation was conducted of various jet exit vane configurations in the open test section of the Langley 4- by 7-Meter Tunnel to determine their effectiveness in reducing flow pulsations. The data consist of the instantaneous velocity fluctuations measured with hot-wire anemometers located at the tunnel centerline, 39.5 ft (12.0) downstream of the jet exit. The data are presented in the form of measured root-mean-square turbulence levels in the test section and a time series analysis for the baseline jet exit configuration (without vanes) and forthe most effective vane configuration, which consisted of triangular vanes alternating into and out of the flow around the jet exit.
Document ID
19850009690
Acquisition Source
Legacy CDMS
Document Type
Technical Memorandum (TM)
Authors
Sellers, W. L., III (NASA Langley Research Center Hampton, VA, United States)
Applin, Z. T. (NASA Langley Research Center Hampton, VA, United States)
Molloy, J. K. (NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 5, 2013
Publication Date
March 1, 1984
Subject Category
Aerodynamics
Report/Patent Number
NAS 1.15:86299
NASA-TM-86299
L-15810
Accession Number
85N17999
Funding Number(s)
PROJECT: RTOP 505-43-13
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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