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Titre : |
Galbrun based numerical scheme to compute time-harmonic scattering in an arbitrary mean flow |
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Année : |
2011 |
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Type : |
conférence internationale avec actes |
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Auteurs : |
A.-S. Bonnet-BenDhia, J.-F. Mercier, F. Millot, S. Pernet, E. Peynaud |
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Résumé : |
For the numerical simulation of time-harmonic acoustic scattering in a complex geom-
etry, in presence of an arbitrary mean
ow, the main diculty is the coexistence and the
coupling of two very di erent phenomena: acoustic propagation and convection of vortices.
We consider a linearized formulation coupling an augmented Galbrun equation (for the
perturbation of displacement) with a time-harmonic convection equation (for the vortices).
In addition, the computational region is truncated by means of Perfectly Matched Layers
at arti cial boundaries. We implemented a hybrid numerical method which consists in
coupling nite elements for the Galbrun equation and a Discontinuous Galerkin scheme for
the convection equation. Finally, numerical tests show the eciency of the method. |
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Thèmes : |
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Référence : |
- American Institute of Aeronautics and Astronautics |
