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The effects of temperature on supersonic jet noise emissionThis paper examines the generation of sound produced by high temperature supersonic jets. In particular, the question of the importance of supersonic instability waves to noise emission is considered relative to the role of Kelvin-Helmholtz (K-H) instability waves. Here, these waves are taken to be synonymous with the Mach emission process. Jet total temperatures from 313 to 1534 K are investigated using an axisymmetric water cooled supersonic nozzle designed for Mach 2. The aerodynamic and acoustic results of this study indicate that the dominant noise contributors are the K-H waves over the entire temperature range. Good agreement between measured and numerically predicted plume properties are obtained and an elliptic nozzle is used to demonstrate reduction of the K-H waves.
Document ID
19930035162
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Seiner, John M.
(NASA Langley Research Center Hampton, VA, United States)
Ponton, Michael K.
(NASA Langley Research Center Hampton, VA, United States)
Jansen, Bernard J.
(NASA Langley Research Center Hampton, VA, United States)
Lagen, Nicholas T.
(Lockheed Engineering and Sciences Co. Hampton, VA, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1992
Publication Information
Publication: In: DGLR(AIAA Aeroacoustics Conference, 14th, Aachen, Germany, May 11-14, 1992, Proceedings. Vol. 1 (A93-19126 05-71)
Publisher: Deutsche Gesellschaft fuer Luft- und Raumfahrt
Subject Category
Acoustics
Accession Number
93A19159
Distribution Limits
Public
Copyright
Other

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