NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Jet Noise SuppressionThe objectives of this chapter are to review and summarize the jet noise suppression technology, to provide a physical and theoretical model to explain the measured jet noise suppression characteristics of different concepts, and to provide a set of guidelines for evolving jet noise suppression designs. The underlying principle for all jet noise suppression devices is to enhance rapid mixing (i.e., diffusion) of the jet plume by geometric and aerothermodynamic means. In the case of supersonic jets, the shock-cell broadband noise reduction is effectively accomplished by the elimination or mitigation of the shock-cell structure. So far, the diffusion concepts have predominantly concentrated on jet momentum and energy (kinetic and thermal) diffusion, in that order, and have yielded better noise reduction than the simple conical nozzles. A critical technology issue that needs resolution is the effect of flight on the noise suppression potential of mechanical suppressor nozzles. A more thorough investigation of this mechanism is necessary for the successful development and design of an acceptable noise suppression device for future high-speed civil transports.
Document ID
19920005566
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Gliebe, P. R.
(General Electric Co. Cincinnati, OH, United States)
Brausch, J. F.
(General Electric Co. Cincinnati, OH, United States)
Majjigi, R. K.
(General Electric Co. Cincinnati, OH, United States)
Lee, R.
(General Electric Co. Cincinnati, OH, United States)
Date Acquired
August 15, 2013
Publication Date
August 1, 1991
Publication Information
Publication: NASA. Langley Research Center, Aeroacoustics of Flight Vehicles: Theory and Practice. Volume 2: Noise Control
Subject Category
Acoustics
Accession Number
92N14784
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
No Preview Available