Numerical investigation of the effect of trailing edge deformations on noise from jets exhausting over flat plates

Colby Horner, Adrian Sescu, Mohammed Afsar, Eric Collins

Research output: Contribution to conferenceProceeding

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Abstract

The design of aircraft propulsion configurations must digress from the typical configurations that are utilized on the majority of aircraft in order to consider the effects of environmental issues as well as the noise that is generated from the engines. One unconventional approach under consideration involves rectangular jets near flat surfaces that are parallel to the jet axis. This type of configuration makes an attempt to muffle the noise that propagates to the ground, but previous experimental work showed that the noise generated by this configuration was actually increased due to the effect that the plate trailing edge exerts on the flow. We conduct large eddy simulations to determine if wall deformations at the plate trailing edge could reduce the jet noise. A high aspect ratio rectangular nozzle is placed over a flat surface featuring sinusoidal deformations at the leading edge, with different wavenumbers and amplitudes. Our previous numerical simulations, which targeted configurations with small deformation amplitudes and high wavenumbers, showed that the trailing edge deformations only had a small effect on the noise. Here, we consider new configurations in an attempt to determine if a more significant reduction of the jet noise is possible.
Original languageEnglish
Number of pages1
Publication statusPublished - 22 Nov 2020
Event73rd Annual Meeting of the APS Division of Fluid Dynamics - Online Event, Chicago, United States
Duration: 22 Nov 202024 Nov 2020
http://meetings.aps.org/Meeting/DFD20

Conference

Conference73rd Annual Meeting of the APS Division of Fluid Dynamics
Abbreviated titleAPS-DFD 2021
Country/TerritoryUnited States
CityChicago
Period22/11/2024/11/20
Internet address

Keywords

  • aeroacoustics
  • trailing edge noise
  • Computational Fluid Dynamics (CFD)

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