Comptes Rendus
Experimental and computational visualization of the flow field in a thermoacoustic stack
Comptes Rendus. Mécanique, Volume 331 (2003) no. 1, pp. 17-24.

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.

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.

Received:
Accepted:
Published online:
DOI: 10.1016/S1631-0721(02)00002-5
Keywords: Heat transfer, Thermoacoustics, Oscillatory flow, PIV, Simulation
Mot clés : Transfers thermiques, Thermoacoustique, Écoulement oscillant, PIV, Simulation

Philippe Blanc-Benon 1; Etienne Besnoin 2; Omar Knio 2

1 Centre acoustique, LFMA UMR CNRS 5509, École centrale de Lyon, 69134 Écully cedex, France
2 Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA
@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/

[1] Rayleigh Theory of Sound, Dover, New York, 1945

[2] G.W. Swift Thermoacoustic engines, J. Acoust. Soc. Am., Volume 84 (1988), pp. 1145-1180

[3] A.S. Worlikar; O.M. Knio Numerical simulation of a thermoacoustic refrigerator. Part I: Unsteady adiabatic flow around the stack, J. Comput. Phys., Volume 127 (1996), pp. 424-451

[4] A.S. Worlikar; O.M. Knio; R. Klein Numerical simulation of thermoacoustic refrigerator. Part II: Stratified flow around the stack, J. Comput. Phys., Volume 144 (1998), pp. 299-324

[5] A.S. Worlikar; O.M. Knio Numerical study of oscillatory flow and heat transfer in a loaded thermoacoustic stack, Numer. Heat Transfer Part A, Volume 35 (1999), pp. 49-65

[6] M. Wetzel; C. Herman Experimental study of thermoacoustic effects on a single plate. Part II: Heat transfer, Heat Mass Transfer, Volume 35 (1999), pp. 433-441

[7] M. Wetzel; C. Herman Experimental study of thermoacoustic effects on a single plate. Part I: Temperature fields, Heat Mass Transfer, Volume 36 (2000), pp. 7-20

[8] S. Duffourd, Réfrigérateur Thermoacoustique: Études analytiques et expérimentales en vue d'une miniaturisation, Ph.D. Thesis, N°2001-06, École Centrale de Lyon, 2001

[9] E. Besnoin, Numerical Study of Thermoacoustic Heat Exchangers, Ph.D. Thesis, Department of Mechanical Engineering, The Johns Hopkins University, 2001

[10] M. Raffel; C. Willert; J. Kompenhans Particle Image Velocimetry. A Practical Guide, Springer-Verlag, Berlin, 1998

[11] W.P. Arnott; H. Bass; R. Raspet General formulation of thermoacoustics for stacks having arbitrarily shaped pore cross sections, J. Acoust. Soc. Am., Volume 90 (1991), pp. 3228-3237

Cited by Sources:

Comments - Policy