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Analyse numérique de l'effet de la flottabilité et amélioration du transfert de chaleur dans un écoulement d'eau supercritique à travers des tubes nervurés de l'intérieur.

Numerical analysis of buoyancy effect and heat transfer enhancement in flow of supercritical water through internally ribbed tubes.

Auteurs : LI Z., WU Y., TANG G., et al.

Type d'article : Article

Résumé

Heat transfer to supercritical water in vertical Internally Ribbed Tubes (IRT) with various geometries was numerically investigated in a range of p?=?25?MPa, Tb?=?590?~?700?K, G?=?100?~?1000?kg·m-2·s-1, q?=?200?~?800?kW/m2 and q/G?=?0.33?~?3?kJ/kg. The Shear-Stress Transport k–? (SST) model was employed to solve the turbulent flow and conjugate heat transfer. In IRT with different rib geometries, buoyancy-induced deterioration of heat transfer did not occur and buoyancy forces continuously enhanced heat transfer at Bo?

Détails

  • Titre original : Numerical analysis of buoyancy effect and heat transfer enhancement in flow of supercritical water through internally ribbed tubes.
  • Identifiant de la fiche : 30017633
  • Langues : Anglais
  • Source : Applied Thermal Engineering - vol. 98
  • Date d'édition : 05/04/2016
  • DOI : http://dx.doi.org/10.1016/j.applthermaleng.2016.01.007

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