An acoustic investigation of a supersonic, multi-stream jet with aft deck: Characterization and acoustically-optimal operating conditions

Matthew G. Berry, Andrew S. Magstadt, Mark N. Glauser, Christopher J. Ruscher, Sivaram Gogineni, Barry V. Kiel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

23 Scopus citations

Abstract

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.

Original languageEnglish (US)
Title of host publication54th AIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624103933
StatePublished - 2016
Event54th AIAA Aerospace Sciences Meeting, 2016 - San Diego, United States
Duration: Jan 4 2016Jan 8 2016

Publication series

Name54th AIAA Aerospace Sciences Meeting
Volume0

Other

Other54th AIAA Aerospace Sciences Meeting, 2016
CountryUnited States
CitySan Diego
Period1/4/161/8/16

ASJC Scopus subject areas

  • Aerospace Engineering

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    Berry, M. G., Magstadt, A. S., Glauser, M. N., Ruscher, C. J., Gogineni, S., & Kiel, B. V. (2016). An acoustic investigation of a supersonic, multi-stream jet with aft deck: Characterization and acoustically-optimal operating conditions. In 54th AIAA Aerospace Sciences Meeting (54th AIAA Aerospace Sciences Meeting; Vol. 0). American Institute of Aeronautics and Astronautics Inc, AIAA.