Article Dans Une Revue Proceedings of the Mavlyutov Institute of Mechanics Année : 2017

Broadband liner impedance eduction for multimodal acoustic propagation in the presence of a mean flow

Résumé

Modeling of acoustic propagation in a duct with absorbing treatment is considered. The surface impedance of the treatment is sought in the form of a rational fraction. The numerical model is based on a resolution of the linearized Euler equations by finite difference time domain for the calculation of the acoustic propagation under a grazing flow. Sensitivity analysis of the considered numerical model is performed. The uncertainty of the physical parameters is taken into account to determine the most influential input parameters. The robustness of the solution vis-a-vis changes of the flow characteristics and the propagation medium is studied.

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hal-01724956 , version 1 (05-02-2025)

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Renata Troian, Didier Dragna, Christophe Bailly, Marie-Annick Galland. Broadband liner impedance eduction for multimodal acoustic propagation in the presence of a mean flow. Proceedings of the Mavlyutov Institute of Mechanics, 2017, 11 (2), pp.150-155. ⟨10.21662/uim2016.2.022⟩. ⟨hal-01724956⟩
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