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Études de l’écoulement diphasique lors d’une détente brusque à l’aide de la tomographie par capacitance électrique.

Studies of two-phase flow through a sudden expansion using electrical capacitance tomography.

Auteurs : ROMAN A. J., ERVIN J. S., CRONIN J.

Type d'article : Article de la RIF

Résumé

In this work, electrical capacitance tomography (ECT) was used to measure the changes in void fraction immediately after a sudden expansion for horizontally flowing refrigerant R-134a. The two-phase flow behavior occurring in the sudden expansion was also analyzed using a high-speed camera for two different area ratios of 0.145 and 0.44. Void fractions determined from correlations found in the literature were compared with experimental measurements made immediately after a sudden expansion. It was found that none of the correlations examined could represent the behavior of the void fraction immediately after the expansion. A modified correlation was proposed to model the void fraction behavior occurring right after the expansion. This new correlation was able to predict the void fraction within a ± 20% error band when compared with experimental data at mass velocities of 50 to 250 kg m−2s−1 and area ratios of 0.145 and 0.44.

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Pages : 206-215

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Détails

  • Titre original : Studies of two-phase flow through a sudden expansion using electrical capacitance tomography.
  • Identifiant de la fiche : 30027794
  • Langues : Anglais
  • Sujet : Technologie
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 119
  • Date d'édition : 11/2020
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.07.002

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