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Document IIF

Modèle actualisé de la chute de pression diphasique due au frottement à l'intérieur de minicanaux.

Updated model for two phase frictional pressure drop inside minichannels.

Numéro : pap. n. 4

Auteurs : DEL COL D., BISETTO A., BORTOLATO M., et al.

Résumé

The objective of this work is to investigate frictional pressure drops during adiabatic liquid-vapor flow inside minichannels. New experimental pressure drop data, relative to two-phase flow inside circular and noncircular horizontal channels with hydraulic diameters ranging from 0.96 to 2 mm are presented. By analyzing this data the present authors updated the two-phase frictional pressure drop model presented by Cavallini et al. (2009a, 2009b), developing a new equation to calculate the effects of surface roughness on the frictional pressure drop as a function of the liquid-only Reynolds number. Predictions of the present updated model are successfully compared against the new two-phase pressure drop database and against the values computed with other two-phase pressure drop correlations.

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Pages : 10 p.

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Détails

  • Titre original : Updated model for two phase frictional pressure drop inside minichannels.
  • Identifiant de la fiche : 30006396
  • Langues : Anglais
  • Source : RCR 2012. 3rd IIR Workshop on Refrigerant Charge Reduction in Refrigerating Systems: Valencia, Spain, October 25-26, 2012.
  • Date d'édition : 25/10/2012

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