Comptes Rendus
no. 9
An acoustic analogy applied to the laminar upstream flow over an open 2D cavity
[Une analogie acoustique appliquée aux écoulements dans une cavité ouverte de deux dimensions]
Jonas Ask1  ; Lars Davidson2
1 Volvo Car Corporation, Fluid Dynamic Center, 405 31 Göteborg, Sweden
2 Division of Thermo and Fluid Dynamics, Chalmers, University of Technology, 412 96 Göteborg, Sweden
Comptes Rendus. Mécanique, Volume 333 (2005) no. 9, pp. 660-665.

Dans cette étude une version modifiée de l'analogie de Lighthill–Curle est utilisée pour l'étude de l'acoustique en amont d'un écoulement laminaire passant une cavité. Trois cas incompressibles sont réalisés et comparés avec leurs homologues compressibles. Les trois cas incompressibles comprennent différents pas temporels, distances séparant le bord amount du bord aval et différentes résolutions spatiales dans la direction de l'écoulement. Le but de l'étude est l'analyse des différences entre les sources compressibles et incompressibles dans l'équation de Lighthill–Curle et leur influence sur le son propagé.

In this work a modified version of the Lighthill–Curle's analogy is applied to study the near field acoustics of an upstream laminar flow past an open cavity. Three incompressible cases have been computed and are compared against the corresponding compressible results. The three incompressible cases are carried out with different time-step sizes, distances from the cavity trailing edge to the outlet and spatial resolution in the streamwise direction. The aim of the work is to study the differences in compressible and incompressible sources in Lighthill–Curle's equation and their influence on the sound radiated.

Publié le :
DOI : 10.1016/j.crme.2005.07.005
Keywords: Acoustics, Curle, Cavity, Incompressible CFD
Mot clés : Acoustique, Curle, Cavité, Incompressible CFD
Jonas Ask 1 ; Lars Davidson 2

1 Volvo Car Corporation, Fluid Dynamic Center, 405 31 Göteborg, Sweden
2 Division of Thermo and Fluid Dynamics, Chalmers, University of Technology, 412 96 Göteborg, Sweden 
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Jonas Ask; Lars Davidson. An acoustic analogy applied to the laminar upstream flow over an open 2D cavity. Comptes Rendus. Mécanique, Volume 333 (2005) no. 9, pp. 660-665. doi : 10.1016/j.crme.2005.07.005. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2005.07.005/

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