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Heat Transfer Research
Facteur d'impact: 0.404 Facteur d'impact sur 5 ans: 0.8 SJR: 0.264 SNIP: 0.504 CiteScore™: 0.88

ISSN Imprimer: 1064-2285
ISSN En ligne: 2162-6561

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Heat Transfer Research

DOI: 10.1615/HeatTransRes.v38.i4.20
pages 299-312

Mathematical Model of Combustion in Particulate 2-Phase Flow

Aleksandar Saljnikov
Faculty of Mechanical Engineering, University of Belgrade, Belgrade 11000, Serbia and Montenegro
Simeon N. Oka
Laboratory for Thermal Engineering and Institute of Nuclear Sciences — VINCA, Belgrade 11001, Serbia and Montenegro
Zarko M. Stevanovic
Institute of Nuclear Sciences - VINCA, Laboratory for Thermal Engineering and Energy PO. Box 522, 11001 Belgrade, Serbia and Montenegro

RÉSUMÉ

A mathematical and numerical model of pulverized coal combustion in wide-range-use furnaces with swirl burners, i.e., within a turbulent particle-laden swirl flow in axisymmetric geometry is presented. The model is based on the k−ε model, considering the presence of the solid phase via the additional source terms in the gas phase equations. The disperse phase is treated through the history of particular particles by using the Lagrangian Stochastic Deterministic model. Devolatilization, homogeneous and heterogeneous chemical reaction processes are modeled via the global combustion model using own reaction kinetics data. The model was used to perform an analysis of influence of flow parameters and coal characteristics upon combustion in a wide-range-use furnace. The model was verified by comparing computational and experimental results for combustion of polydisperse pulverized coal in an experimental furnace.


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