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  4. Experimental assessment of an active (acoustic) liner prototype in an acoustic flow duct facility
 
conference paper

Experimental assessment of an active (acoustic) liner prototype in an acoustic flow duct facility

Billon, Kevin
•
De Bono, Emanuele
•
Perez, Matthias
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April 14, 2021
Proc. SPIE Conferences, Health Monitoring of Structural and Biological Systems XV
SPIE Smart Structures + Nondestructive Evaluation, 2021

In this paper, experimental results of broadband noise reduction in an acoustic flow duct are presented. An active liner composed of an array of electroacoustic absorbers is used. The control law is based on the pressure-based, current driven digital architecture for impedance control with a local control strategy. A wind tunnel test rig named Caïman has been used for the experimental validation. The results confirm the adaptability and the stability of the whole system with the local control strategy. The air flow slightly reduces the efficiency while maintaining the adaptability and the stability.

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