Wall-resolved large-eddy simulations of inclined deep cavity flows in acoustic resonance
Wall-resolved large-eddy simulations of inclined deep cavity flows in acoustic resonance
This paper presents a preliminary investigation on acoustic resonance from deep and inclined cavities with an aspect ratio of $D/L=2.632$ at three different inclination angles, subjected to a turbulent boundary layer at a Mach number of 0.3 using high-order accurate large-eddy simulations. The primary aim of this study is to provide a plausible explanation of the fluid-acoustic coupling mechanism that triggers a self-sustained acoustic resonance in deep and inclined cavities. Doak's momentum potential theory is used for investigating separate contributions from hydrodynamic and acoustic components emanating from the turbulent mixing layers. Furthermore, linearised Navier-Stokes equations and acoustic perturbation equations are used to find some tangible information about the global stability of the cavity system. A full extent of the mechanisms contributing to the deep and inclined cavity resonance may be achieved if we better understand the pure shear layer dynamics that exists prior to acoustic excitations.
Ho, You-wei
bf2b7395-c153-453b-85a9-6435741d6b57
Kim, Jae Wook
fedabfc6-312c-40fd-b0c1-7b4a3ca80987
13 June 2022
Ho, You-wei
bf2b7395-c153-453b-85a9-6435741d6b57
Kim, Jae Wook
fedabfc6-312c-40fd-b0c1-7b4a3ca80987
Ho, You-wei and Kim, Jae Wook
(2022)
Wall-resolved large-eddy simulations of inclined deep cavity flows in acoustic resonance.
28th AIAA/CEAS Aeroacoustics 2022 Conference, Hilton at the Ageas Bowl, Southampton, United Kingdom.
14 - 17 Jun 2022.
(doi:10.2514/6.2022-2924).
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Conference or Workshop Item
(Paper)
Abstract
This paper presents a preliminary investigation on acoustic resonance from deep and inclined cavities with an aspect ratio of $D/L=2.632$ at three different inclination angles, subjected to a turbulent boundary layer at a Mach number of 0.3 using high-order accurate large-eddy simulations. The primary aim of this study is to provide a plausible explanation of the fluid-acoustic coupling mechanism that triggers a self-sustained acoustic resonance in deep and inclined cavities. Doak's momentum potential theory is used for investigating separate contributions from hydrodynamic and acoustic components emanating from the turbulent mixing layers. Furthermore, linearised Navier-Stokes equations and acoustic perturbation equations are used to find some tangible information about the global stability of the cavity system. A full extent of the mechanisms contributing to the deep and inclined cavity resonance may be achieved if we better understand the pure shear layer dynamics that exists prior to acoustic excitations.
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Published date: 13 June 2022
Venue - Dates:
28th AIAA/CEAS Aeroacoustics 2022 Conference, Hilton at the Ageas Bowl, Southampton, United Kingdom, 2022-06-14 - 2022-06-17
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Local EPrints ID: 482451
URI: http://eprints.soton.ac.uk/id/eprint/482451
PURE UUID: b6770406-e05a-4801-9a30-b104ce2a2fca
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Date deposited: 05 Oct 2023 16:37
Last modified: 18 Mar 2024 03:00
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Author:
You-wei Ho
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