IIR document
Numerical simulations of a vortex tube working with subcritical carbon dioxide.
Number: 0121
Author(s) : OBERTI R., LAGRANDEUR J., PONCET S.
Summary
A numerical benchmark of a Ranque-Hilsch vortex tube using subcritical carbon dioxide as the working fluid is performed. Different thermodynamic models and two-equation turbulence models in high or low-Reynolds number formulations are compared to experimental data available in the literature. On the one hand, the results show that the k-ω SST model outperforms both the high and low-Reynolds number formulations of the Standard k-ε model in terms of cold and hot outlet total temperature prediction. On the other hand, real-gas equations of state show greater accuracy even at present subcritical conditions. In this regard, the multiparameter Span-Wagner equation of state yields the best hot outlet total temperature prediction particularly at high operating pressure. Hence, the k-ω SST model in conjunction with the Span-Wagner equation of state are selected to comment internal flow features and investigate the exergy efficiency of the present vortex tube at multiple cold mass fractions.
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Details
- Original title: Numerical simulations of a vortex tube working with subcritical carbon dioxide.
- Record ID : 30029721
- Languages: English
- Subject: Technology
- Source: 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022.
- Publication date: 2022/06/13
- DOI: http://dx.doi.org/10.18462/iir.gl2022.0121
- Document available for consultation in the library of the IIR headquarters only.
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