Algorithme de calcul rapide et précis des propriétés du CO2 pour les simulations numériques massives d'éjecteurs supersoniques diphasiques.
Fast and accurate CO2 properties calculation algorithm for massive numerical simulations of supersonic two-phase ejectors.
Numéro : pap. 2174
Auteurs : FANG Y., LORENZO de M., LAFON P., et al.
Résumé
This work presents a look-up table method to compute the thermodynamic properties of CO2. It is motivated by the massive employment of this fluid in the industrial domain, especially in the ejector-expansion cycle. Computational Fluid Dynamics simulations have been used in the past to investigate two-phase ejector flows. CO2 exhibits large property variations due to phase transition. As a result, it cannot be accurately modelled by a general analytical Equation of State (EoS), such as Peng-Robinson EoS, or Perfect gas EoS, etc. Hence, a tabulated EoS is developed here based on the Span-Wagner (EoS), covering the temperature range from 217 K to 800 K and pressures up to 50 MPa. Supercritical, liquid, vapor and liquid-vapor states are all included in this tabulated EoS. Besides, the density and the internal energy are chosen as two independent inputs to compute the other properties. The method is designed to be coupled with the system of equations in its conservative form which is a usual formulation for compressible solvers suited for ejectors. Through two validation cases, the proposed tabulated EoS shows good performances in terms of accuracy and efficiency, making it suitable for future massive CFD simulations.
Documents disponibles
Format PDF
Pages : 10
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 : Fast and accurate CO2 properties calculation algorithm for massive numerical simulations of supersonic two-phase ejectors.
- Identifiant de la fiche : 30024438
- Langues : Anglais
- Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
- Date d'édition : 09/07/2018
Liens
Voir d'autres communications du même compte rendu (252)
Voir le compte rendu de la conférence
-
A non symmetric interfacial area density formul...
- Auteurs : ORTEGO SAMPEDRO E.
- Date : 05/2021
- Langues : Anglais
- Source : 2021 Purdue Conferences. 18th International Refrigeration and Air-Conditioning Conference at Purdue.
- Formats : PDF
Voir la fiche
-
Two-fluid CFD model for R744 two-phase ejectors.
- Auteurs : RINGSTAD K., HAFNER A.
- Date : 07/12/2020
- Langues : Anglais
- Source : 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
- Formats : PDF
Voir la fiche
-
A density-based solver using real gas propertie...
- Auteurs : FANG Y., PONCET S., BARTOSIEWICZ Y., et al.
- Date : 24/08/2019
- Langues : Anglais
- Source : Proceedings of the 25th IIR International Congress of Refrigeration: Montréal , Canada, August 24-30, 2019.
- Formats : PDF
Voir la fiche
-
Modelling of CO2 transonic flashing ...
- Auteurs : ANGIELCZYK W., BUTRYMOWICZ D., GAGAN J., SMIERCIEW K.
- Date : 21/08/2023
- Langues : Anglais
- Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
- Formats : PDF
Voir la fiche
-
Comparative study of R744 ejector CFD models.
- Auteurs : RINGSTAD K., HAFNER A.
- Date : 13/01/2021
- Langues : Anglais
- Source : 10th IIR Conference on Compressors and Refrigerants.
- Formats : PDF
Voir la fiche