Extending on-demand noise reduction technology to military-style nozzles with 6 fluidic corrugations

Scott M. Hromisin, Russell W. Powers, Dennis K. McLaughlin, Philip J. Morris

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

Abstract

The fluidic corrugation on-demand noise reduction technology has been extended to military-style nozzles with 6 fluidic corrugations. Measured far-field acoustics for jets exhausting from a 6 fluidic corrugation nozzle are compared to jets exhausting from nozzles with 3 fluidic corrugations and 6 hard-walled corrugations. Unheated jet measurements of nozzles with fluidic corrugations and hardwalled corrugations demonstrated up to 5 dB reductions in the turbulent mixing noise at the peak frequency and over 3 dB OASPL noise reductions in the rear arc. An analysis of the skewness of the pressure derivative from heat-simulated jet measurements suggested hard-walled corrugations and fluidic corrugations decreased jet crackle. Heat-simulated jet experiments using the 6 fluidic corrugation nozzle showed a peak noise reduction of 2.9 dB OASPL in the rear arc. Prior heatsimulated jet experiments using nozzles with 3 fluidic corrugations demonstrated noise reductions in excess of 5 dB OASPL in the peak noise direction. Reasons for the decreased performance of the 6 fluidic corrugation nozzle are proposed and will be the subject of future investigations.

Original languageEnglish (US)
Title of host publication23rd AIAA/CEAS Aeroacoustics Conference, 2017
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105043
StatePublished - 2017
Event23rd AIAA/CEAS Aeroacoustics Conference, 2017 - Denver, United States
Duration: Jun 5 2017Jun 9 2017

Publication series

Name23rd AIAA/CEAS Aeroacoustics Conference, 2017

Other

Other23rd AIAA/CEAS Aeroacoustics Conference, 2017
CountryUnited States
CityDenver
Period6/5/176/9/17

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Hromisin, S. M., Powers, R. W., McLaughlin, D. K., & Morris, P. J. (2017). Extending on-demand noise reduction technology to military-style nozzles with 6 fluidic corrugations. In 23rd AIAA/CEAS Aeroacoustics Conference, 2017 (23rd AIAA/CEAS Aeroacoustics Conference, 2017). American Institute of Aeronautics and Astronautics Inc, AIAA.