[Visualisation expérimentale et numérique du champ de vitesse dans un réfrigérateur thermoacoustique]
L'écoulement oscillant autour de l'empilement de plaques d'un réfrigérateur thermoacoustique est visualisé expérimentalement avec une technique PIV et numériquement en utilisant des simulations basées sur un modèle d'écoulement à faible nombre de Mach. Les conditions d'expérience et de simulation sont similaires. Les résultats sont obtenus pour deux configurations distinctes, respectivement des plaques épaisses et des plaques fines. Dans le deuxième cas, l'écoulement autour des extrémités est caractérisé par des couches de vorticité étirées, alors qu'avec des plaques épaisses l'écoulement est dominé par les oscillations de tourbillons denses. Les résultats obtenus expérimentalement et numériquement sont similaires, et renforcent la validité des deux méthodes.
The oscillating flow field in a thermoacoustic stack is visualized experimentally using PIV measurements, and computationally using results of low-Mach-number simulations. The experiments and computations are performed under similar conditions. Results are obtained for two distinct configurations, involving thin and thick stack plates. In the first case, the flow field around the edge of the stack exhibits elongated vorticity layers, while in the latter it is dominated by the shedding and impingement of concentrated vortices. A close agreement between experimental and computational results is found, thus providing strong support for both approaches and further predictions.
Accepté le :
Publié le :
Mots-clés : Transfers thermiques, Thermoacoustique, Écoulement oscillant, PIV, Simulation
Philippe Blanc-Benon 1 ; Etienne Besnoin 2 ; Omar Knio 2
@article{CRMECA_2003__331_1_17_0,
author = {Philippe Blanc-Benon and Etienne Besnoin and Omar Knio},
title = {Experimental and computational visualization of the flow field in a thermoacoustic stack},
journal = {Comptes Rendus. M\'ecanique},
pages = {17--24},
publisher = {Elsevier},
volume = {331},
number = {1},
year = {2003},
doi = {10.1016/S1631-0721(02)00002-5},
language = {en},
}
TY - JOUR AU - Philippe Blanc-Benon AU - Etienne Besnoin AU - Omar Knio TI - Experimental and computational visualization of the flow field in a thermoacoustic stack JO - Comptes Rendus. Mécanique PY - 2003 SP - 17 EP - 24 VL - 331 IS - 1 PB - Elsevier DO - 10.1016/S1631-0721(02)00002-5 LA - en ID - CRMECA_2003__331_1_17_0 ER -
%0 Journal Article %A Philippe Blanc-Benon %A Etienne Besnoin %A Omar Knio %T Experimental and computational visualization of the flow field in a thermoacoustic stack %J Comptes Rendus. Mécanique %D 2003 %P 17-24 %V 331 %N 1 %I Elsevier %R 10.1016/S1631-0721(02)00002-5 %G en %F CRMECA_2003__331_1_17_0
Philippe Blanc-Benon; Etienne Besnoin; Omar Knio. Experimental and computational visualization of the flow field in a thermoacoustic stack. Comptes Rendus. Mécanique, Volume 331 (2003) no. 1, pp. 17-24. doi : 10.1016/S1631-0721(02)00002-5. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/S1631-0721(02)00002-5/
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