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Document IIF

Solveur par densité utilisant les propriétés des gaz réels pour des simulations de vaporisation instantanée par détente supersonique de R744.

A density-based solver using real gas properties for R744 supersonic flashing simulations.

Numéro : pap. n. 263

Auteurs : FANG Y., PONCET S., BARTOSIEWICZ Y., et al.

Résumé

A density-based solver based on the OpenFoam library is coupled with a tabulated equation of state which allows to accurately compute the properties of CO2 at a reduced computational cost. The homogeneous equilibrium model (HEM) is considered to predict the phase-change phenomenon. The Navier-Stokes characteristic boundary condition is used as the outlet boundary condition to guarantee the accuracy and stability of the simulation. As a result, this solver is suitable to simulate supersonic flashing CO2 flows in converging-diverging nozzles and supersonic ejectors. Firstly, the flows in the converging-diverging nozzle are simulated under supercritical condition. A good agreement in terms of pressure distribution is obtained. Then, a two-phase CO2 ejector is investigated numerically. Once again, a good agreement is obtained against experimental wall pressure measurements.

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Pages : 8

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    20 €

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Détails

  • Titre original : A density-based solver using real gas properties for R744 supersonic flashing simulations.
  • Identifiant de la fiche : 30025975
  • Langues : Anglais
  • Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
  • Date d'édition : 24/08/2019
  • DOI : http://dx.doi.org/10.18462/iir.icr.2019.0263

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