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Simulation numérique du transfert de chaleur à convection mixte de l'hélium surcritique en écoulement forcé.

Numerical simulation of mixed convection heat transfer to forced flow supercritical helium.

Numéro : pap. n. 045

Auteurs : REBELO N., GHOSH P.

Résumé

Supercritical helium has found its application as a coolant for superconducting magnets in accelerators and fusion devices. However, due to wide variation in thermodynamic and transport properties like specific heat, density and thermal conductivity in the vicinity of the transposed critical line, accurate prediction of heat flux using heat transfer correlations becomes difficult. Existing correlations have been compared with data obtained from CFD analysis for cases where experimental data are not available. Finally, effect of natural convection on forced convection heat transfer has been explored to gain in-sight into the underlying physical mechanism. CFD analysis has been performed using commercial software Ansys® Fluent. From the analysis, it has been found that fluent can predict experimental trends accurately over the wide range of heat fluxes. The observations have been used to arrive at conclusions regarding the causes of difficult phenomena and their impacts on the design of equipment involving supercritical helium.

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Format PDF

Pages : 199-205

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Détails

  • Titre original : Numerical simulation of mixed convection heat transfer to forced flow supercritical helium.
  • Identifiant de la fiche : 30006527
  • Langues : Anglais
  • Source : Cryogenics 2012. Proceedings of the 12th IIR International Conference: Dresden, Germany, September 11-14, 2012.
  • Date d'édition : 11/09/2012

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