Design and analysis of a supersonic jet noise reduction concept

Anthony R. Pilon, Russell W. Powers, Dennis K. McLaughlin, Philip J. Morris

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

2 Scopus citations

Abstract

The design and analysis of a simple jet noise reduction concept is discussed. The concept is intended for use on the type of supersonic exhaust nozzles typically employed on tactical aircraft. The concept addresses both broadband shock associated noise (BBSAN), and turbulent mixing noise. BBSAN is addressed through a reduction in the effective exhaust area, which reduces the strength of the shock cell structure in the jet. Turbulent mixing noise is reduced by enhancement of mixing in the jet shear layer, which creates a shorter region of strongly turbulent flow, and breaks up the large scale turbulent structures. This paper describes an active control device that deflets a fraction of the adjustable seals in the divergent section of the engine exhaust nozzle. After takeoff, the deflected seals would be returned to their undeflected position. Very favorable jet noise reductions are demonstrated at multiple observer angles for nominal takeoff conditions.

Original languageEnglish (US)
Title of host publication52nd Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624102561
DOIs
StatePublished - 2014
Event52nd Aerospace Sciences Meeting 2014 - National Harbor, United States
Duration: Jan 13 2014Jan 17 2014

Publication series

Name52nd Aerospace Sciences Meeting

Other

Other52nd Aerospace Sciences Meeting 2014
CountryUnited States
CityNational Harbor
Period1/13/141/17/14

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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    Pilon, A. R., Powers, R. W., McLaughlin, D. K., & Morris, P. J. (2014). Design and analysis of a supersonic jet noise reduction concept. In 52nd Aerospace Sciences Meeting (52nd Aerospace Sciences Meeting). American Institute of Aeronautics and Astronautics Inc.. https://doi.org/10.2514/6.2014-0525