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Acoustic test results from a 36 inch (0.914m) statorless lift fan with serrated and unserrated rotor bladesTest results of the LF336/E statorless lift fan with serrated and unserrated rotor leading edges are presented. Fan broadband noise reductions from 2 to 5 dB were achieved in the forward quadrant at frequencies from 100 to 2500 Hz. Broadband noise near and above the blade passing frequency was reduced only at angles of 80 to 100 degrees.
Document ID
19750010170
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Stimpert, D. L. (General Electric Co. Cincinnati, OH, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1975
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
GE-TIS-R74AEG406
NASA-CR-137622
Report Number: GE-TIS-R74AEG406
Report Number: NASA-CR-137622
Accession Number
75N18242
Funding Number(s)
CONTRACT_GRANT: NAS2-5462
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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