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Summary of forward velocity effects on fan noiseAvailable experimental data comparing the in-flight and static behavior of fan noise are reviewed. These results are then compared with recent data obtained for a fan stage tested with forward velocity in a low speed wind tunnel. Tentative conclusions are presented about the significance and nature of the changes in noise observed when a forward velocity is imposed. Finally, the implications of the emerging picture of in-flight fan source noise for suppressor design are discussed.
Document ID
19770025215
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Feiler, C. E. (NASA Lewis Research Center Cleveland, OH, United States)
Groeneweg, J. F. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 3, 2013
Publication Date
October 1, 1977
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
E-9209
NASA-TM-73722
Report Number: E-9209
Report Number: NASA-TM-73722
Meeting Information
Meeting: Aeroacoustics Conf.
Location: Atlanta
Start Date: October 3, 1977
End Date: October 5, 1977
Sponsors: AIAA
Accession Number
77N32159
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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