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Fan noise-mode structure in a ductTwo computer programs help analyst meet low-noise limits on turbofan engines. Microphone Location Program computes optimum locations in turbofan duct for placement of microphones. After tests in first program are run, acoustic phase, amplitude, and pressure are used as inputs in Modal Calculation Program.
Document ID
19790000393
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Love, R. A. (Pratt and Whitney Aircraft Group)
Pickett, G. F. (Pratt and Whitney Aircraft Group)
Wells, R. A. (Pratt and Whitney Aircraft Group)
Date Acquired
August 10, 2013
Publication Date
April 1, 1980
Publication Information
Publication: NASA Tech Briefs
Volume: 4
Issue: 3
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
LEW-13129
Report Number: LEW-13129
ISSN: 0145-319X
Accession Number
79B10393
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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