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conference paper

Electro-active acoustic liner for the reduction of turbofan noise

Salze, Edouard
•
De Bono, Emanuele
•
Billon, Kévin
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Astolfi, Arianna
•
Asdrubali, Francesco
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January 17, 2024
Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023
Forum Acusticum 2023, the 10th Convention of the European Acoustics Association

An electro-active acoustic liner is used to lower the noise emissions of a turbofan engine. The liner is composed of an array of electro-acoustic absorbers, covered by a wiremesh in order to protect the electrodynamic devices from the flow. The electro-active liner is operated using a pressure-based and current-driven control architecture, for the synthesis of specific acoustic impedances. Experiments are performed in the PHARE-2 test-rig at École Centrale de Lyon, representative of a real turbofan engine at the laboratory scale. The obtained results underline the efficiency of the proposed concept on both tonal and broadband noise for a large range of operating points of the turbofan engine, including transsonic conditions.

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000558.pdf

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Main Document

Version

http://purl.org/coar/version/c_970fb48d4fbd8a85

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openaccess

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CC BY

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2.1 MB

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Adobe PDF

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