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INTERACTION SON-ÉCOULEMENT

Abstract : We study the interaction between a sound wave and a mean flow. For this, we
have developed two complementaries analysis tools: a formal one based on a partial
wave developement of the sound wave, and a direct numerical simulation with
unreflected boundary conditions for compressible, isothermal and non dissipative
flows.

Thus, we can quantify the far-field and the Born approximations, generally used
in calculations of the sound-flow interaction. Then, we analyse both
the scattering behavior beyond the Born approximation for a zero circulation
flow and the relevant roll of refraction by the mean flow in the scattering
process. We also discuss in which cases vorticity acts as the principal source
of scattering. Finally, we show how the developed tools allow the analysis of
experimental situations dealing with the scattering by turbulent flows.
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https://tel.archives-ouvertes.fr/tel-00003781
Contributor : Remy Berthet <>
Submitted on : Tuesday, November 18, 2003 - 5:24:28 PM
Last modification on : Wednesday, November 20, 2019 - 3:22:36 AM
Long-term archiving on: : Friday, April 2, 2010 - 6:55:39 PM

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  • HAL Id : tel-00003781, version 1

Citation

Remy Berthet. INTERACTION SON-ÉCOULEMENT. Acoustique [physics.class-ph]. Ecole normale supérieure de lyon - ENS LYON, 2001. Français. ⟨tel-00003781⟩

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