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Vélocimètrie laser Doppler bidimensionnelle pour écoulement turbulent supersonique : quelques aspects spécifiques des processus de mesure

Abstract : The study of supersonic turbulent flows by Laser Doppler Velocimétry raises many specific difficulties. The high frequencies of the velocity fluctuations pose in particular the problem of the inertia of the particles, worsened by the low density of the fluid. In the two-dimensional setup, the process of validation of the signals strongly depends on the instantaneous measured velocity direction. These phenomena whose consequences were highlighted in present measurements are largely studied and commented on. We developed and sometimes optimized the statistical two-dimensional data processing. The treatment of the time interval separating acquisitions already shows the possibility for the major difficulties which are opposed to a systematic exploitation of this temporal data.
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https://tel.archives-ouvertes.fr/tel-00010954
Contributor : Jean-Paul Lacharme <>
Submitted on : Thursday, December 1, 2005 - 9:08:42 AM
Last modification on : Thursday, March 5, 2020 - 6:57:56 PM
Long-term archiving on: : Monday, September 20, 2010 - 1:14:34 PM

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  • HAL Id : tel-00010954, version 2

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Jean-Paul Lacharme. Vélocimètrie laser Doppler bidimensionnelle pour écoulement turbulent supersonique : quelques aspects spécifiques des processus de mesure. Mécanique [physics.med-ph]. Université de la Méditerranée - Aix-Marseille II, 1984. Français. ⟨tel-00010954v2⟩

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