TY - GEN
T1 - An acoustic investigation of a supersonic, multi-stream jet with aft deck
T2 - 54th AIAA Aerospace Sciences Meeting, 2016
AU - Berry, Matthew G.
AU - Magstadt, Andrew S.
AU - Glauser, Mark N.
AU - Ruscher, Christopher J.
AU - Gogineni, Sivaram
AU - Kiel, Barry V.
N1 - Publisher Copyright:
© 2016, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2016
Y1 - 2016
N2 - The current experiments investigate the acoustic characteristics of an idealized, supersonic rectangular nozzle with aft deck used for three-stream engines. Since the second stream for these jet configurations mix with the bulk flow far before the nozzle's exit plane, a completely mixed first and second stream is assumed. Thus, this jet is represented as two unmixed exhaust flows that come from a three-stream engine. The nozzle is configured as a rectangular single expansion ramp (SERN) convergent/divergent (CD) nozzle with a variable speed bypass (3rd) stream. By varying the Mach number in the 3rd stream, we are able to alter the flow towards a state of “lower noise” while causing minimal effects to the mass flow rate of the jet. The experiments were conducted using far-field microphone arrays, aft deck pressure measurements, schlieren imaging, and investigates different aft deck lengths and far-field locations.
AB - The current experiments investigate the acoustic characteristics of an idealized, supersonic rectangular nozzle with aft deck used for three-stream engines. Since the second stream for these jet configurations mix with the bulk flow far before the nozzle's exit plane, a completely mixed first and second stream is assumed. Thus, this jet is represented as two unmixed exhaust flows that come from a three-stream engine. The nozzle is configured as a rectangular single expansion ramp (SERN) convergent/divergent (CD) nozzle with a variable speed bypass (3rd) stream. By varying the Mach number in the 3rd stream, we are able to alter the flow towards a state of “lower noise” while causing minimal effects to the mass flow rate of the jet. The experiments were conducted using far-field microphone arrays, aft deck pressure measurements, schlieren imaging, and investigates different aft deck lengths and far-field locations.
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U2 - 10.2514/6.2016-1883
DO - 10.2514/6.2016-1883
M3 - Conference contribution
AN - SCOPUS:85007534148
SN - 9781624103933
T3 - 54th AIAA Aerospace Sciences Meeting
BT - 54th AIAA Aerospace Sciences Meeting
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
Y2 - 4 January 2016 through 8 January 2016
ER -