Computations of fluid dynamics of a 50 MWe circulating fluidized bed combustor / Liu Guodong in Industrial & engineering chemistry research, Vol. 49 N° 11 (Juin 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5132–5140 Titre : Computations of fluid dynamics of a 50 MWe circulating fluidized bed combustor Type de document : texte imprimé Auteurs : Liu Guodong, Auteur ; Sun Dan, Auteur ; Huilin Lu, Auteur Année de publication : 2010 Article en page(s) : pp. 5132–5140 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Fluid dynamics Résumé : Gas−particle two-phase turbulent flows are numerically studied in a 50 MWe circulating fluidized bed combustor. The dense flow of particles is modeled by the frictional stress models adopted from solid mechanics theory, and the dilute flow in the so-called rapid granular flow regime is modeled from the kinetic theory of granular flow. At low concentrations the viscosity due to the effect of the presence of particles is modeled by means of a semiempirical viscosity for fluidized catalytic cracking particles. The distribution of the velocity and concentration of particles in a circulating fluidized bed combustor is predicted. Simulations indicate that the dense regime with a high concentration of particles is in the bottom part and the dilute regime with a low concentration in the upper part of the furnace. The effect of secondary air on the flow behavior is analyzed, and the penetration length of the secondary air jet is computed in a 50 MWe circulating fluidized bed combustor. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901103t [article] Computations of fluid dynamics of a 50 MWe circulating fluidized bed combustor [texte imprimé] / Liu Guodong, Auteur ; Sun Dan, Auteur ; Huilin Lu, Auteur . - 2010 . - pp. 5132–5140. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 11 (Juin 2010) . - pp. 5132–5140 Mots-clés : Fluid dynamics Résumé : Gas−particle two-phase turbulent flows are numerically studied in a 50 MWe circulating fluidized bed combustor. The dense flow of particles is modeled by the frictional stress models adopted from solid mechanics theory, and the dilute flow in the so-called rapid granular flow regime is modeled from the kinetic theory of granular flow. At low concentrations the viscosity due to the effect of the presence of particles is modeled by means of a semiempirical viscosity for fluidized catalytic cracking particles. The distribution of the velocity and concentration of particles in a circulating fluidized bed combustor is predicted. Simulations indicate that the dense regime with a high concentration of particles is in the bottom part and the dilute regime with a low concentration in the upper part of the furnace. The effect of secondary air on the flow behavior is analyzed, and the penetration length of the secondary air jet is computed in a 50 MWe circulating fluidized bed combustor. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901103t

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