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OSCEE fan exhaust bulk absorber treatment evaluationThe acoustic suppression capability of bulk absorber material designed for use in the fan exhaust duct walls of the quiet clean short haul experiment engine (OCSEE UTW) was evaluated. The acoustic suppression to the original design for the engine fan duct which consisted of phased single degree-of-freedom wall treatment was tested with a splitter and also with the splitter removed. Peak suppression was about as predicted with the bulk absorber configuration, however, the broadband characteristics were not attained. Post test inspection revealed surface oil contamination on the bulk material which could have caused the loss in bandwidth suppression.
Document ID
19800014825
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bloomer, H. E.
(NASA Lewis Research Center Cleveland, OH, United States)
Samanich, N. E.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 4, 2013
Publication Date
January 1, 1980
Subject Category
Aircraft Propulsion And Power
Report/Patent Number
E-435
NASA-TM-81498
Meeting Information
Meeting: Aeroacoustics Conf.
Start Date: June 4, 1980
End Date: June 6, 1980
Sponsors: AIAA
Accession Number
80N23314
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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