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Numerical predictions of turbulence-cascade interaction noise using CAA with a stochastic model

Numerical predictions of turbulence-cascade interaction noise using CAA with a stochastic model
Numerical predictions of turbulence-cascade interaction noise using CAA with a stochastic model
Turbulent flow interactions with the outlet guide vanes are known to be mainly contributing to broadband noise emission of aeroengines at approach conditions. This paper presents a 3D CAA hybrid method aiming at simulating the aeroacoustic response of an annular cascade impacted by a prescribed homogeneous isotropic turbulent flow. It is based on a time-domain Euler solver coupled to a synthetic turbulence model implemented in the code by means of a suited inflow boundary condition proposed by Tam. The fluctuating pressure over the airfoil surface provided by CAA is used as an input to a FWH integral to calculate the radiated sound field. The method is first validated against an academic CAA benchmark in the case of a harmonic gust interacting with an annular flat plate cascade. Then, simulations are applied to turbulence-cascade interactions for annular configurations, in uniform and swirling mean flows, and numerical results in terms of sound power spectra in the outlet duct are compared to semi-analytical and numerical solutions, and to an available experiment
Clair, V.
4fc28cab-f835-4f4e-a50d-0040865da0ff
Polacsek, C.
20a2423a-93a0-414f-ae65-1328a75af49f
Le Garrec, T.
a2b52c1f-add1-4c19-824c-ec223cba8471
Jacob, M.
b0a8aca5-ce32-483e-90e1-90a770ad31ab
Clair, V.
4fc28cab-f835-4f4e-a50d-0040865da0ff
Polacsek, C.
20a2423a-93a0-414f-ae65-1328a75af49f
Le Garrec, T.
a2b52c1f-add1-4c19-824c-ec223cba8471
Jacob, M.
b0a8aca5-ce32-483e-90e1-90a770ad31ab

Clair, V., Polacsek, C., Le Garrec, T. and Jacob, M. (2014) Numerical predictions of turbulence-cascade interaction noise using CAA with a stochastic model. 20th AIAA/CEAS Aeroacoustics Conference, Atlanta, United States. 16 - 20 Jun 2014. (doi:10.2514/6.2014-2453).

Record type: Conference or Workshop Item (Paper)

Abstract

Turbulent flow interactions with the outlet guide vanes are known to be mainly contributing to broadband noise emission of aeroengines at approach conditions. This paper presents a 3D CAA hybrid method aiming at simulating the aeroacoustic response of an annular cascade impacted by a prescribed homogeneous isotropic turbulent flow. It is based on a time-domain Euler solver coupled to a synthetic turbulence model implemented in the code by means of a suited inflow boundary condition proposed by Tam. The fluctuating pressure over the airfoil surface provided by CAA is used as an input to a FWH integral to calculate the radiated sound field. The method is first validated against an academic CAA benchmark in the case of a harmonic gust interacting with an annular flat plate cascade. Then, simulations are applied to turbulence-cascade interactions for annular configurations, in uniform and swirling mean flows, and numerical results in terms of sound power spectra in the outlet duct are compared to semi-analytical and numerical solutions, and to an available experiment

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Published date: June 2014
Venue - Dates: 20th AIAA/CEAS Aeroacoustics Conference, Atlanta, United States, 2014-06-16 - 2014-06-20
Organisations: Acoustics Group

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Local EPrints ID: 372214
URI: http://eprints.soton.ac.uk/id/eprint/372214
PURE UUID: 56b5dd1b-0b74-496d-99af-57a9e1f404ac

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Date deposited: 08 Dec 2014 09:05
Last modified: 14 Mar 2024 18:33

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Contributors

Author: V. Clair
Author: C. Polacsek
Author: T. Le Garrec
Author: M. Jacob

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