In recent years, several numerical studies have shown the feasibility of Direct Noise Computation (DNC) where the turbulent flow and the radiated acoustic field are obtained simultaneously by solving the compressible Navier–Stokes equations. The acoustic radiation obtained by DNC can be used as reference solution to investigate hybrid methods in which the sound field is usually calculated as a by-product of the flow field obtained by a more conventional Navier–Stokes solver. A hybrid approach is indeed of practical interest when only the non-acoustic part of the aerodynamic field is available. In this review, some acoustic analogies or hybrid approaches are revisited in the light of CAA.
Plusieurs travaux récents ont montré la faisabilité d'un calcul direct du bruit d'origine aérodynamique par résolution des équations de Navier–Stokes compressibles. Le champ acoustique obtenu par ce calcul direct peut servir de solution de référence pour étudier les méthodes hybrides, où le champ acoustique rayonné est calculé à partir d'une solution des équations de Navier–Stokes obtenue avec un solver conventionnel. Les méthodes hybrides sont en effet destinées à prévoir le champ sonore lorsqu'il est difficile d'effectuer un calcul aérodynamique compressible. Dans cet article, quelques analogies acoustiques sont revisitées en s'appuyant sur des résultats de l'aéroacoustique numérique.
Mots-clés : Acoustique, Aéroacoustique numérique, Analogie de Lighthill, Analogie de Ffowcs Williams et Hawkings, Propagation en écoulement, Diffraction
Christophe Bailly 1; Christophe Bogey 1; Xavier Gloerfelt 2
@article{CRMECA_2005__333_9_666_0, author = {Christophe Bailly and Christophe Bogey and Xavier Gloerfelt}, title = {Some useful hybrid approaches for predicting aerodynamic noise}, journal = {Comptes Rendus. M\'ecanique}, pages = {666--675}, publisher = {Elsevier}, volume = {333}, number = {9}, year = {2005}, doi = {10.1016/j.crme.2005.07.006}, language = {en}, }
TY - JOUR AU - Christophe Bailly AU - Christophe Bogey AU - Xavier Gloerfelt TI - Some useful hybrid approaches for predicting aerodynamic noise JO - Comptes Rendus. Mécanique PY - 2005 SP - 666 EP - 675 VL - 333 IS - 9 PB - Elsevier DO - 10.1016/j.crme.2005.07.006 LA - en ID - CRMECA_2005__333_9_666_0 ER -
Christophe Bailly; Christophe Bogey; Xavier Gloerfelt. Some useful hybrid approaches for predicting aerodynamic noise. Comptes Rendus. Mécanique, Computational AeroAcoustics: from acoustic sources modeling to farfield radiated noise prediction, Volume 333 (2005) no. 9, pp. 666-675. doi : 10.1016/j.crme.2005.07.006. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.07.006/
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