Publication de 12 numéros par an
ISSN Imprimer: 1044-5110
ISSN En ligne: 1936-2684
Indexed in
NUMERICAL SIMULATION OF DIESEL SPRAY EVAPORATION EXPLOITING THE "STABILIZED COOL FLAME" PHENOMENON
RÉSUMÉ
An alternative approach to enhance conventional liquid fuel evaporation can be based on the stabilized cool flame phenomenon. To demonstrate this, the present work numerically simulates the flow field inside an atmospheric-pressure cool flame reactor, using a two-phase computational fluid dynamics code, based on the solution of the RANS equations. Such a reactor exploits the "stabilized cool flame phenomenon, augmenting local evaporation rates and leading to a partially oxidised mixture that can be subsequently burnt. A Eulerian-Lagrangian formulation is adopted for the description of the gas field and droplet motion equations, respectively, and a stochastic approach is implemented to account for the effects of turbulence on the droplet motion. Droplet evaporation is modeled with the use of an evaporation model incorporating the Stefan blowing effect. In addition, a semiempirical model developed especially for this purpose is used to model the heat release due to the exothermic cool flame reactions. Numerical simulations are presented for test cases with and without cool flame reactions and compared to available experimental data. The satisfactory agreement between experiments and predictions confirms the ability of the approach to simulate reasonably well the main phenomena observed in a cool flame reactor.
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Kolaitis Dionysios I., Founti Maria A., Cool Flames, in Handbook of Combustion, 2010. Crossref
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Kolaitis Dionysios I., Founti Maria A., Numerical Simulation of Diesel Spray Evaporation in a “Stabilized Cool Flame” Reactor: A Comparative Study, Flow, Turbulence and Combustion, 82, 4, 2009. Crossref
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Kolaitis Dionysios I., Founti Maria A., A 3D CFD Modelling Study of a Diesel Oil Evaporation Device Operating in the Stabilized Cool Flame Regime, The Journal of Computational Multiphase Flows, 2, 4, 2010. Crossref
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Kolaitis D.I., Founti M.A., A comparative study of numerical models for Eulerian–Lagrangian simulations of turbulent evaporating sprays, International Journal of Heat and Fluid Flow, 27, 3, 2006. Crossref
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Kontogeorgos D.A., Keramida E.P., Founti M.A., Assessment of simplified thermal radiation models for engineering calculations in natural gas-fired furnace, International Journal of Heat and Mass Transfer, 50, 25-26, 2007. Crossref
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Kolaitis D.I., Founti M.A., A tabulated chemistry approach for numerical modeling of diesel spray evaporation in a “stabilized cool flame” environment, Combustion and Flame, 145, 1-2, 2006. Crossref
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Vourliotakis George, Kolaitis Dionysios I., Founti Maria A., Development and Parametric Evaluation of a Tabulated Chemistry Tool for the Simulation of n-Heptane Low-Temperature Oxidation and Autoignition Phenomena, Journal of Combustion, 2014, 2014. Crossref
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Sikka Raghav, Vågsæther Knut, Bjerketvedt Dag, Lundberg Joachim, Atomization characteristics of a bluff body-assisted sonic twin-fluid atomizer, International Journal of Spray and Combustion Dynamics, 2022. Crossref