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Characteristics of Residual Mixing Noise From Internal Fan/Core MixersThe jet mixing noise from two fan/core mixer nozzles is studied. Acoustic data from two fan/core mixer nozzles are analyzed to determine the properties of the noise signatures. It was assumed that there were three major contributors to the total noise signature: noise from mixing of the fan and core streams internal to the nozzle; noise from residual mixing of the fan and core streams external to the nozzle; and the noise associated with the fully mixed jet. In general, the low frequency portion of the noise spectra can be associated with the fully mixed jet and can be predicted using an empirical correlation for single round nozzle jet noise. The properties of the noise in excess of the fully mixed levels are studied.
Document ID
19970010367
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Krejsa, Eugene A. (NASA Lewis Research Center Cleveland, OH United States)
Saiyed, Naseem H. (NASA Lewis Research Center Cleveland, OH United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1997
Subject Category
Acoustics
Report/Patent Number
E-10600
NAS 1.15:107395
NASA-TM-107395
AIAA Paper 97-0382
Meeting Information
Meeting: Aerospace Sciences Meeting and Exhibit
Location: Reno, NV
Country: United States
Start Date: January 6, 1997
End Date: January 10, 1997
Sponsors: American Society for Electrical Engineers, Society of Automotive Engineers, Inc., American Inst. of Aeronautics and Astronautics, American Society of Mechanical Engineers
Accession Number
97N15554
Funding Number(s)
PROJECT: RTOP 538-03-11
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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