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Comparaison des conditions de transfert de chaleur dans un faisceau de tubes à écoulement croisé pour diverses formes de tubes.

Comparison of heat transfer conditions in tube bundle crossflow for different tube shapes.

Auteurs : HORVAT A., LESKOVAR M., MAVKO B.

Type d'article : Article

Résumé

Detailed transient numerical simulations of fluid and heat flow were performed for a number of heat exchanger segments with cylindrical, ellipsoidal and wing-shaped tubes in a staggered arrangement. The purpose of the analysis was to get an insight of local heat transfer and fluid flow conditions in a heat exchanger and to establish widely applicable drag coefficient and Stanton number correlations for the heat exchanger integral model, based on average flow variables. The simulation results revealed much more complex flow behaviour than reported in current literature. For each of the almost 100 analyzed cases, the time distributions of the Reynolds number, the drag coefficient and the Stanton number were recorded, and their average values calculated. Based on these average values, the drag coefficient and the Stanton number correlations were constructed as polynomial functions of the Reynolds number and the hydraulic diameter. The comparison of the collected results also allows more general conclusions on efficiency and stability of the heat transfer process in tube bundles. [Reprinted with permission from Elsevier. Copyright, 2005].

Détails

  • Titre original : Comparison of heat transfer conditions in tube bundle crossflow for different tube shapes.
  • Identifiant de la fiche : 2007-0577
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 49 - n. 5-6
  • Date d'édition : 03/2006

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