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Noise tests of a mixer nozzle-externally blown flap systemNoise tests were conducted on a large scale model of an externally blown flap lift augmentation system, employing a mixer nozzle. The mixer nozzle consisted of seven flow passages with a total equivalent diameter of 40 centimeters. With the flaps in the 30 - 60 deg setting, the noise level below the wing was less with the mixer nozzle than when a standard circular nozzle was used. At the 10 - 20 deg flap setting, the noise levels were about the same when either nozzle was used. With retracted flaps, the noise level was higher when the mixer nozzle was used.
Document ID
19730015332
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Technical Note (TN)
Authors
Goodykoontz, J. H. (NASA Lewis Research Center Cleveland, OH, United States)
Dorsch, R. G. (NASA Lewis Research Center Cleveland, OH, United States)
Groesbeck, D. E. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
May 1, 1973
Subject Category
Aircraft
Report/Patent Number
E-7288
NASA-TN-D-7236
Accession Number
73N24059
Funding Number(s)
PROJECT: RTOP 741-89
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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