Aeroacoustic performance of multi-stream, rectangular, supersonic jets

Scott M. Hromisin, Junichi Akatsuka, Dennis K. McLaughlin, Philip J. Morris

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

3 Scopus citations


Multi-stream, variable cycle point, turbofan engines with rectangular exhaust profiles are in consideration for future tactical aircraft. Such engine architectures aim to combine the benefits of low-profile, simple geometry nozzles with the ability to cycle between high-thrust and high-efficiency operation as required by the demands of the flight profile. There exists a need to improve the understanding of the aeroacoustic characteristics of low bypass ratio, multi-stream rectangular exhaust jets. This work reports on a series of experiments that have been performed in an effort to begin meeting this demand. Model-scale far field acoustic data are reported for heat-simulated, supersonic, dual stream, rectangular jets. Acoustic data are compared with far field noise measurements of single round and rectangular jets operating at equivalent thrust and mass flow rate jet conditions. Dual stream jets demonstrate the potential for noise reductions over 4 dB OASPL in the peak noise emission direction compared to single stream equivalent jets.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
StatePublished - Jan 1 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum


ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering


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