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Suppressing buzz-saw noise in jet enginesBuzz-saw noise, most annoying noise component generated by turbofan engines, can be suppresses by installing porous surface on duct wall directly above engine fan-blade tip. Porous surface and its housing would reduce shock-wave reflection from wall and thus suppress noise.
Document ID
19800000220
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Maestrello, L.
Date Acquired
August 10, 2013
Publication Date
September 1, 1980
Publication Information
Publication: NASA Tech Briefs
Volume: 5
Issue: 2
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
LAR-12645
Accession Number
80B10220
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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