Comptes Rendus
Acoustic source terms study for non-isothermal flows using an aeroacoustic hybrid approach
Comptes Rendus. Mécanique, Volume 333 (2005) no. 9, pp. 688-693.

This paper presents a numerical study of noise source term in non-isothermal flows in the context of an aeroacoustic hybrid technique at low Mach numbers. Asymptotic analysis applied to the fully compressible Navier–Stokes equations provides separated sets of equations for the dynamic of the flow and the production and propagation of acoustic waves. Comparisons with analytical dipole and quadrupole distributions are performed, confirming the dipole type of non-isothermal source distribution. This paper is a preliminary work for some more extensive studies on the topic.

Cet article présente une étude numérique des sources acoustiques dans le cas d'écoulements anisothermes à faibles nombres de Mach. Un développement asymptotique des équations de Navier–Stokes compressibles fournit des systèmes d'équations séparés pour la dynamique de l'écoulement et pour la génération et la propagation acoustique. Des comparaisons à des distributions de sources analytiques de types dipolaire et quadripolaire confirment la nature dipolaire de la composante des sources liée aux fluctuations de température.

Published online:
DOI: 10.1016/j.crme.2005.07.014
Keywords: Acoustics, Aeroacoustic sources, Non-isothermal flow, Low Mach number
Mot clés : Acoustique, Sources aéroacoustiques, Écoulements anisothermes, Faibles nombres de Mach

François Golanski 1; Christian Prax 1

1 Laboratoire d'études aérodynamiques, université de Poitiers, UMR CNRS 6609, bâtiment K, 40, avenue du recteur Pineau, 86000 Poitiers, France
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François Golanski; Christian Prax. Acoustic source terms study for non-isothermal flows using an aeroacoustic hybrid approach. Comptes Rendus. Mécanique, Volume 333 (2005) no. 9, pp. 688-693. doi : 10.1016/j.crme.2005.07.014. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.07.014/

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