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Modélisation unidimensionnel de l'écoulement supersonique diphasique du dioxyde de carbone à travers une tuyère d'éjecteur motrice.

1-D modelling of supersonic carbon dioxide two-phase flow through ejector motive nozzle.

Numéro : pap. n. R19, 2362

Auteurs : ANGIELCZYK W., SEYNHAEVE J. M., BUTRYMOWICZ D., et al.

Résumé

A promising device which could help to reduce losses and improve efficiency of CO2 transcritical refrigeration cycle, is the ejector technology. However, modelling such a device is really challenging because not only the transcritical nature of the flow but also the occurrence of a choked flow rate, where thermodynamics equilibrium is a big issue. The two-phase critical flow of carbon dioxide through ejector motive nozzle is modelled by means of the homogeneous relaxation model (HRM). Existing closure laws for relaxation time were adapted for carbon dioxide. The pressure distribution along the nozzle is calculated for three different nozzle geometries and compared with an experimental data. The issue of the sound velocity is discussed in terms of differences between prediction accuracy of homogenous equilibrium model and HRM.

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : 1-D modelling of supersonic carbon dioxide two-phase flow through ejector motive nozzle.
  • Identifiant de la fiche : 30000792
  • Langues : Anglais
  • Source : 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 12/07/2010

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