Publication de 12 numéros par an
ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684
Indexed in
A COMPARATIVE RANS/LES STUDY OF TRANSIENT GAS JETS AND SPRAYS UNDER DIESEL CONDITIONS
RÉSUMÉ
This study aimed at a better understanding of the transient nature of axisymmetric gas jets and sprays under diesel conditions. To evaluate the performances of the Reynolds-averaged Navier-Stokes (RANS) and the large eddy simulation (LES) modeling approaches, a comparative computational study using both methodologies has been performed for the same computational cases with the same numerical algorithm and spatial resolution. The results show that LES is capable of capturing the unsteady features of transient gas jets and sprays such as flow vortical structures, whereas RANS is incapable of resolving these features. Furthermore, the excessive dissipation in the RANS simulation can lead to underprediction of the jet penetration, while LES can better represent the jet mixing and entrainment, which offers a promising tool for numerical prediction of transient jets and sprays.
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Okong’o Nora, Leboissetier Anthony, Bellan Josette, Detailed characteristics of drop-laden mixing layers: Large eddy simulation predictions compared to direct numerical simulation, Physics of Fluids, 20, 10, 2008. Crossref
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Jiang X., Siamas G.A., Jagus K., Karayiannis T.G., Physical modelling and advanced simulations of gas–liquid two-phase jet flows in atomization and sprays, Progress in Energy and Combustion Science, 36, 2, 2010. Crossref
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Jagus Krzysztof, Jiang Xi, Large Eddy Simulation of Diesel Fuel Injection and Mixing in a HSDI Engine, Flow, Turbulence and Combustion, 87, 2-3, 2011. Crossref
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Abani Neerav, Ghoniem Ahmed F., Large eddy simulations of coal gasification in an entrained flow gasifier, Fuel, 104, 2013. Crossref
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Pereira Gerald G., Cleary Paul W., Serizawa Yoshihiro, Prediction of fluid flow through and jet formation from a high pressure nozzle using Smoothed Particle Hydrodynamics, Chemical Engineering Science, 178, 2018. Crossref
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Van Dam Noah, Rutland Christopher, Adapting diesel large-eddy simulation spray models for direct-injection spark-ignition applications, International Journal of Engine Research, 17, 3, 2016. Crossref
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Bharadwaj N, Rutland C J, Chang S, Large eddy simulation modelling of spray-induced turbulence effects, International Journal of Engine Research, 10, 2, 2009. Crossref
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Sciortino Davide Domenico, Bonatesta Fabrizio, Hopkins Edward, Bell Daniel, Cary Mark, A systematic approach to calibrate spray and break-up models for the simulation of high-pressure fuel injections, International Journal of Engine Research, 2021. Crossref