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  4. Smart Acoustic Lining for UHBR Technologies Engine Part 2: acoustic treatment at the intake of a scaled turbofan nacelle
 
conference paper

Smart Acoustic Lining for UHBR Technologies Engine Part 2: acoustic treatment at the intake of a scaled turbofan nacelle

De Bono, E.
•
Collet, M.
•
Billon, K.
Show more
2024
30th AIAA/CEAS Aeroacoustics Conference, 2024
30th AIAA/CEAS Aeroacoustics Conference

The new generation of Ultra-High-By-Pass-Ratio (UHBR) turbofan engine while considerably reducing fuel consumption, threatens higher noise levels at low frequencies because of its larger diameter, lower number of blades and rotational speed. This is accompanied by a shorter nacelle, leaving less available space for acoustic treatments. In this context, a progress in the liner technology is highly demanded, prospecting alternative solutions to classic liners. The SALUTE H2020 project has taken up this challenge, proposing electro-active acoustic liners, made up of loudspeakers (actuators) and microphones (sensors). The electro-active means allow to program the surface impedance on the electroacoustic liner, but also to conceive alternative boundary laws. Test-rigs of gradually increasing complexities have allowed to raise the Technology Readiness Level (TRL) up to 3-4. In this second part, the electroacoustic liner is adapted to treat the walls at the intake of a scaled turbofan nacelle. The performance of the electroacoustic liner demonstrate its potentialities for reducing noise radiation from turbofan.

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Type
conference paper
DOI
10.2514/6.2024-3304
Scopus ID

2-s2.0-85202837671

Author(s)
De Bono, E.

Laboratoire de Tribologie et Dynamique des Systèmes

Collet, M.

Laboratoire de Tribologie et Dynamique des Systèmes

Billon, K.

Laboratoire de Tribologie et Dynamique des Systèmes

Salze, E.

École Centrale de Lyon

Lissek, H.  

École Polytechnique Fédérale de Lausanne

Volery, M.  

École Polytechnique Fédérale de Lausanne

Ouisse, M.

Femto-St - Sciences et Technologies

Mardjono, J.

Safran Aircraft Engines

Date Issued

2024

Publisher

American Institute of Aeronautics and Astronautics Inc, AIAA

Published in
30th AIAA/CEAS Aeroacoustics Conference, 2024
ISBN of the book

9781624107207

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LWE  
Event nameEvent acronymEvent placeEvent date
30th AIAA/CEAS Aeroacoustics Conference

Rome, Italy

2023-06-04 - 2023-06-07

FunderFunding(s)Grant NumberGrant URL

European Union’s Horizon 2020 research and innovation programme

N 821093

Available on Infoscience
January 26, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/244725
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