Time-domain simulation of a flow duct with extended-reacting acoustic liners
Résumé
A finite-difference time-domain (FDTD) approach is pro-posed to model extended-reacting liners under a grazingmean flow. It is based on an equivalent fluid model ofthe material together with the auxiliary differential equa-tion method (ADE). The methodology is applicable to anyliner material amenable to an equivalent fluid description,such as rigid-frame porous materials and metamaterials. Ithas been validated against a semi-analytical solution in a1D test case and against experimental measurements in aduct.
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