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Ecoulement du R134a à travers des micro-orifices.

Flow of R134a through micro-orifices.

Auteurs : TU X., HRNJAK P., BULLARD C.

Résumé

The paper presents the experimental results for R134a flowing through micro-orifices with diameters of 31 and 52 microns, and length-to-diameter ratio of 2.5 and 4.2, respectively. For liquid flow without flashing, the experimental data were in rough agreement with macroscale results. The conventional orifice equation is still applicable. For liquid flow with flashing, the experimental results indicate significant differences: the flow was not choked even when downstream pressure was reduced to more than 400 kPa below saturation pressure corresponding to inlet temperature. Semi-empirical model was developed based on correction of the orifice equation.

Détails

  • Titre original : Flow of R134a through micro-orifices.
  • Identifiant de la fiche : 2003-1137
  • Langues : Anglais
  • Source : 2002 Purdue conferences. 2002 compressor engineering & refrigeration and air conditioning conferences at Purdue [CD-ROM].
  • Date d'édition : 16/07/2002
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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