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Theses

Modélisation et contrôle actif des instabilités aéroacoustiques en cavité sous écoulement affleurant

Abstract : This thesis includes modelling, experimental investigations and active control of the aeroacoustics of cavities in low Mach number turbulent flows. A progressive formulation for the stability analysis of the fluid interface separating two uniform flows is first presented. The oscillation stages show dependance to the geometric configuration and to the Mach number. An experimental model of adjustable dimensions is then investigated using pressure measurements. The extensive resulting data partially validate the chosen theoretical analysis. A vibrating apparatus is designed and applied to the active control of the aeroacoustic stages with focus on the fluid-resonant conditions. Proof is given that this system leads to a deterministic modulation of the coupling intensity. Finally, a Particle Image Velocimetry system is synchronized with chosen oscillation stages in order to validate the theoretical approach and the active control efficiency from an aerodynamic point of view.
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https://tel.archives-ouvertes.fr/tel-00003529
Contributor : Ludovic Chatellier <>
Submitted on : Monday, November 24, 2003 - 4:11:42 PM
Last modification on : Tuesday, October 8, 2019 - 4:30:04 PM
Long-term archiving on: : Wednesday, November 23, 2016 - 3:51:39 PM

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  • HAL Id : tel-00003529, version 2

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Ludovic Chatellier. Modélisation et contrôle actif des instabilités aéroacoustiques en cavité sous écoulement affleurant. Acoustique [physics.class-ph]. Université de Poitiers, 2002. Français. ⟨tel-00003529v2⟩

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