Galbrun based numerical scheme to compute time-harmonic scattering in an arbitrary mean flow

Millot Florence, Pernet Sébastien, Peynaud Emilie, Bonnet-Ben Dhia Anne-Sophie, Mercier Jean-François. 2012. Galbrun based numerical scheme to compute time-harmonic scattering in an arbitrary mean flow. . Reston : American Institute of Aeronautics and Astronautics, 6 p. ISBN 978-1-60086-943-3 AIAA/CEAS Aeroacoustics Conference. 17, Portland, États-Unis, 5 Juin 2011/8 Juin 2011.

Note générale : Ce congrès correspond également à la 32nd AIAA Aeroacoustics Conference

Résumé : For the numerical simulation of time-harmonic acoustic scattering in a complex geom- etry, in presence of an arbitrary mean flow, the main difficulty is the coexistence and the coupling of two very different 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 artificial boundaries. We implemented a hybrid numerical method which consists in coupling finite elements for the Galbrun equation and a Discontinuous Galerkin scheme for the convection equation. Finally, numerical tests show the efficiency of the method.

Auteurs et affiliations

• Millot Florence, CERFACS (FRA)
• Pernet Sébastien, CERFACS (FRA)
• Peynaud Emilie, CERFACS (FRA) ORCID: 0000-0002-2404-8098
• Bonnet-Ben Dhia Anne-Sophie, ENSTA (FRA)
• Mercier Jean-François, ENSTA (FRA)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/613431/)

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