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Computing Propagation Of Sound In Engine DuctsFrequency Domain Propagation Model (FREDOM) computer program accounts for acoustic loads applied to components of engines. Models propagation of noise through fluids in ducts between components and through passages within components. Used not only to analyze hardware problems, but also for design purposes. Updated version of FREQPL program easier to use. Devised specifically for use in analyzing acoustic loads in rocket engines. Underlying physical and mathematical concepts implemented also applicable to acoustic propagation in other enclosed spaces; analyzing process plumbing and ducts in industrial buildings with view toward reducing noise in work areas.
Document ID
19950065297
Acquisition Source
Legacy CDMS
Document Type
Other - NASA Tech Brief
Authors
Saylor, Silvia
(Rockwell International Corp.)
Date Acquired
August 17, 2013
Publication Date
March 1, 1995
Publication Information
Publication: NASA Tech Briefs
Volume: 19
Issue: 3
ISSN: 0145-319X
Subject Category
Mechanics
Report/Patent Number
MFS-29971
Accession Number
95B10138
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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