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Evaluation des coefficients de transfert de chaleur dans des écoulements oscillants : le cas de la thermoacoustique.

Estimation of heat transfer coefficients in oscillating flows: the thermoacoustic case.

Auteurs : PICCOLO A., PISTONE G.

Type d'article : Article

Résumé

The classical linear thermoacoustic theory is integrated through a numerical calculus with a simple energy conservation model to allow estimates of the optimal length of thermoacoustic heat exchangers and of the magnitude of the related heat transfer coefficients between gas and solid walls. This information results from the analysis of the temperature and heat flux density distributions inside a thermally isolated thermoacoustic stack. The effects of acoustic amplitude, plate spacing, plate thickness and Reynolds number on the heat transfer characteristics are examined. The results indicate that a net heat exchange between the acoustically oscillating gas and the solid boundary takes place only within a limited distance from the stack edges. [Reprinted with permission from Elsevier. Copyright, 2005].

Détails

  • Titre original : Estimation of heat transfer coefficients in oscillating flows: the thermoacoustic case.
  • Identifiant de la fiche : 2006-2390
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 49 - n. 9-10
  • Date d'édition : 05/2006

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