On présente le contrôle actif des instabilités aéroacoustiques générées en cavité sous écoulement affleurant effectué à l'aide de la mise en vibration du bord aval de la cavité. Mesures de pression et vélocimétrie par images de particules synchronisée montrent qu'il est possible de moduler l'amplitude des oscillations de la couche de mélange afin d'atténuer ou d'amplifier le bruit rayonné par l'écoulement. Les résultats fournis par un modèle analytique développé au préalable permettent de caractériser les effets du contrôle.
Active control of the aeroacoustics of flow-induced oscillations in a rectangular cavity using a vibrating plate inserted at the downstream edge is demonstrated. Pressure and phase-locked Particle Image Velocimetry measurements show that the oscillations of the mixing layer can be controlled in order to attenuate or amplify the radiated sound. Results obtained from a previously developed analytical model are used to characterize the effects of the control.
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Mots clés : Mécanique des fluides, Acoustique, Expérimental, Instabilité, Contrôle, PIV
Ludovic Chatellier 1 ; Janick Laumonier 1 ; Yves Gervais 2
@article{CRMECA_2006__334_4_259_0,
author = {Ludovic Chatellier and Janick Laumonier and Yves Gervais},
title = {Active control of the aeroacoustics of cavity flows from the downstream edge},
journal = {Comptes Rendus. M\'ecanique},
pages = {259--265},
publisher = {Elsevier},
volume = {334},
number = {4},
year = {2006},
doi = {10.1016/j.crme.2006.03.003},
language = {en},
}
TY - JOUR AU - Ludovic Chatellier AU - Janick Laumonier AU - Yves Gervais TI - Active control of the aeroacoustics of cavity flows from the downstream edge JO - Comptes Rendus. Mécanique PY - 2006 SP - 259 EP - 265 VL - 334 IS - 4 PB - Elsevier DO - 10.1016/j.crme.2006.03.003 LA - en ID - CRMECA_2006__334_4_259_0 ER -
Ludovic Chatellier; Janick Laumonier; Yves Gervais. Active control of the aeroacoustics of cavity flows from the downstream edge. Comptes Rendus. Mécanique, Volume 334 (2006) no. 4, pp. 259-265. doi : 10.1016/j.crme.2006.03.003. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2006.03.003/
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