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Effet de la fréquence oscillatoire sur le transfert de chaleur dans des puits thermiques en mousse métallique avec des pores à densité variables.

Effect of oscillatory frequency on heat transfer in metal foam heat sinks of various pore densities.

Auteurs : LEONG K. C., JIN L. W.

Type d'article : Article

Résumé

In this paper, an experimental investigation was performed to study the heat transfer performance of metal foam heat sinks of different pore densities subjected to oscillating flow under various oscillatory frequencies. The variations of pressure drop and flow velocity along the kinetic Reynolds number of oscillating flow through aluminium foams were compared. The measured pressure drops, velocities and surface temperatures of oscillating flow through aluminium 10, 20 and 40 PPI foams were presented in detail. The calculated cycle-averaged local temperature and Nusselt number for different kinetic Reynolds numbers were analyzed and compared with finned heat sinks. The results of length-averaged Nusselt number for both oscillating and steady flows indicate that higher heat transfer rates can be obtained in metal foams subjected to oscillating flow. For the purpose of designing a novel heat sink using metal foam, the characteristics of the pumping power of the cooling system for aluminium foam with different pore densities were also analyzed. [Reprinted with permission from Elsevier. Copyright, 2005].

Détails

  • Titre original : Effect of oscillatory frequency on heat transfer in metal foam heat sinks of various pore densities.
  • Identifiant de la fiche : 2006-2270
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 49 - n. 3-4
  • Date d'édition : 02/2006

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