CFD simulation of smooth and T-abrupt exits in circulating fluidized bed risers

Particuology - Tập 8 - Trang 343-350 - 2010
Xuezhi Wu1,2, Fan Jiang1, Xiang Xu1, Yunhan Xiao1
1Key Laboratory of Advanced Energy and Power, Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing 100190, China
2Graduate University of the Chinese Academy of Sciences, Beijing 100049, China

Tài liệu tham khảo

Bai, 1992, The axial distribution of the crosssectionally averaged voidage in fast fluidized beds, Powder Technology, 71, 51, 10.1016/0032-5910(92)88003-Z Brereton, 1994, End effects in circulating fluidized bed hydrodynamics, 137 De Wilde, 2003, The effects of abrupt T-outlets in a riser: 3D simulation using the kinetic theory of granular flow, Chemical Engineering Science, 58, 877, 10.1016/S0009-2509(02)00619-X Enwald, 1996, Eulerian two-phase flow theory applied to fluidization, International Journal of Multiphase Flow, 22, 21, 10.1016/S0301-9322(96)90004-X Ergun, 1952, Fluid flow through packed columns, Chemical Engineering Progress, 48, 89 Gera, 2004, Hydrodynamics of particle segregation in fluidized beds, International Journal of Multiphase Flow, 30, 419, 10.1016/j.ijmultiphaseflow.2004.01.003 Gidaspow, 1994 Gidaspow, 2004, Hydrodynamics of fluidization using kinetic theory: An emerging paradigm 2002 Flour-Daniel lecture, Powder Technology, 148, 123, 10.1016/j.powtec.2004.09.025 Grace, 1996, Influence of riser geometry on particle and fluid dynamics in circulating fluidized bed risers, 16 Gupta, 2000, Evaluation of the gas–solid suspension density in CFB risers with exit effects, Powder Technology, 108, 21, 10.1016/S0032-5910(99)00199-0 Gupta, 2005, Bed-to-wall heat transfer modelling in the top region of a CFB riser column with abrupt riser exit geometries, International Journal of Heat and Mass Transfer, 48, 4307, 10.1016/j.ijheatmasstransfer.2005.05.014 Harris, 2003, Influence of exit geometry in circulating fluidized-bed risers, AIChE Journal, 49, 52, 10.1002/aic.690490107 Harris, 2003, The influence of the riser exit on the particle residence time distribution in a circulating fluidised bed riser, Chemical Engineering Science, 58, 3669, 10.1016/S0009-2509(03)00215-X Jenkins, 1983, A theory for the rapid flow of identical, smooth, nearly elastic, spherical-particles, Jounal of Fluid Mechanics, 130, 187, 10.1017/S0022112083001044 Kim, 2002, Pressure balance model for circulating fluidized beds with a loop-seal, Industrial & Engineering Chemistry Research, 41, 4949, 10.1021/ie0202571 Kunii, 1995, Effect of exit geometry on the vertical distribution of solids in circulating fluidized beds. Part I: Solution of fundamental equations; Part II: Analysis of reported data and prediction, Powder Technology, 84, 83, 10.1016/0032-5910(94)02961-M Lackermeier, 2002, Flow phenomena in the exit zone of a circulating fluidized bed, Chemical Engineering and Processing, 41, 771, 10.1016/S0255-2701(02)00008-9 Li, 2005 Lim, 1995, Hydrodynamics of gas–solid fluidization, International Journal of Multiphase Flow, 21, 141, 10.1016/0301-9322(95)00038-Y Martin, 1992, Catalytic cracking in riser reactors: Core-annulus and elbow effects, Chemical Engineering Science, 47, 2319, 10.1016/0009-2509(92)87054-T Mickal, 2001, Effect of exit geometry on the solids distribution in CFB reactor for the fluidization of fine particles: Determination of internal back-mixing with semi-theoretical modelling, Fluidization, 10, 245 O’Brien, 1993, Particle cluster effects in the numerical simulation of a circulating fluidized bed, 430 Qi, 2007, Modeling of drag with the Eulerian approach and EMMS theory for heterogeneous dense gas–solid two-phase flow, Chemical Engineering Science, 62, 1670, 10.1016/j.ces.2005.07.002 Qi, 2000, Eulerian simulation of gas–solid two-phase flow in a CFB-riser under consideration of cluster effects, 231 Senior, 1992, Modelling of circulating fluidised-bed solids flow and distribution, Chemical Engineering Science, 47, 281, 10.1016/0009-2509(92)80020-D Syamlal, M., Rogers, W., & O’Brien, T.J. (1993). MFIX documentation: Theory guide. Technical Note, DOE/METC-94/1004. Wang, 2008, Eulerian simulation of heterogeneous gas–solid flows in CFB risers: EMMS-based sub-grid scale model with a revised cluster description, Chemical Engineering Science, 63, 1553, 10.1016/j.ces.2007.11.023 Wang, 2007, Simulation of gas–solid two-phase flow by a multi-scale CFD approach—Extension of the EMMS model to the sub-grid level, Chemical Engineering Science, 62, 208, 10.1016/j.ces.2006.08.017 Wen, 1966, Mechanics of fluidization, AIChE Chemical Engineering Progress Symposium Series, 62, 100 Xu, 2004, Estimating radial voidage profiles for all fluidization regimes in circulating fluidized bed risers, Powder Technology, 139, 186, 10.1016/j.powtec.2003.10.014 Yang, 2003, CFD simulation of concurrent-up gas–solid flow in circulating fluidized beds with structure-dependent drag coefficient, Chemical Engineering Journal, 96, 71, 10.1016/j.cej.2003.08.006 Zenz, 1958, A theoretical empirical approach to the mechanism of particle entrainment from fluidized beds, AIChE Journal, 4, 472, 10.1002/aic.690040417