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Visualisation et mécanismes d'ébullition libre du propane, d'isobutane et de leurs mélanges sur les tubes à surface augmentée à canaux à contre-courant.

Visualization and mechanisms of pool boiling of propane, isobutane and their mixtures on enhanced tubes with re-entrant channels.

Auteurs : CHEN Y., GROLL M., MERTZ R., et al.

Type d'article : Article

Résumé

Visualization experiments were carried out for boiling of propane, isobutane and their mixtures on a smooth and four re-entrant enhanced tubes. The results shown by the video pictures indicate a strong mixture effect on nucleation and evaporation processes on the enhanced surfaces. The fluid physical properties also influence the bubble behaviour and consequently affect the heat transfer performance. The effects of re-entrant enhanced surface geometries are complicated and closely related to mixture effects, fluid properties and working conditions. Based on the analysis of the available visualization results, the different heat transfer performance for different enhanced surfaces and especially the difference between pure fluids and mixtures, as shown in an accompanying paper (see this Bulletin, reference 2006-0118), are partially explained.

Détails

  • Titre original : Visualization and mechanisms of pool boiling of propane, isobutane and their mixtures on enhanced tubes with re-entrant channels.
  • Identifiant de la fiche : 2006-0139
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 48 - n. 12
  • Date d'édition : 05/2005

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