Trajectories of burning coal particles in highly swirling reactive flows
Finite-element computations and measurements of a strongly swirling flow with pulverized coal combustion are presented. The turbulent flow expands into a low confined combustion chamber which represents the geometry of typical industrial furnaces. Detailed in-flame measurements of velocity, temperat...
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Published in | International journal of heat and fluid flow Vol. 16; no. 5; pp. 440 - 450 |
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Main Authors | , , |
Format | Journal Article Conference Proceeding |
Language | English |
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New York, NY
Elsevier Inc
1995
Elsevier Science |
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Abstract | Finite-element computations and measurements of a strongly swirling flow with pulverized coal combustion are presented. The turbulent flow expands into a low confined combustion chamber which represents the geometry of typical industrial furnaces. Detailed in-flame measurements of velocity, temperature, and gas concentrations were made by suction probes at several cross sections. These data are used for the detailed evaluation of higher-order turbulence models in connection with coal combustion. In modeling the particle-gas flow, the momentum equations are solved by considering the particle phase as a continuum and neglecting the mean slip velocities between the two phases. Trajectories of the individual particles treated as inert matter are subsequently computed employing a Lagrangian method after a convergent flow field solution is obtained. The external forces which influence the particles' motion are considered and compared. Additionally, in a more realistic approach, the mass loss of the coal particles due to devolatilization and char-burnout is taken into account. The influence of the gas-phase turbulence modeling on the particle motion is also investigated. |
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AbstractList | Finite-element computations and measurements of a strongly swirling flow with pulverized coal combustion are presented. The turbulent flow expands into a low confined combustion chamber which represents the geometry of typical industrial furnaces. Detailed in-flame measurements of velocity, temperature, and gas concentrations were made by suction probes at several cross sections. These data are used for the detailed evaluation of higher-order turbulence models in connection with coal combustion. In modeling the particle-gas flow, the momentum equations are solved by considering the particle phase as a continuum and neglecting the mean slip velocities between the two phases. Trajectories of the individual particles treated as inert matter are subsequently computed employing a Lagrangian method after a convergent flow field solution is obtained. The external forces which influence the particles' motion are considered and compared. Additionally, in a more realistic approach, the mass loss of the coal particles due to devolatilization and char-burnout is taken into account. The influence of the gas-phase turbulence modeling on the particle motion is also investigated. |
Author | Hein, K.R.G. Görres, J. Schnell, U. |
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Cites_doi | 10.1002/fld.1650110602 10.1080/00102209308935284 10.1016/0045-7825(74)90029-2 10.1016/0017-9310(79)90113-3 10.1016/0301-9322(93)90080-E 10.2514/3.9369 |
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Keywords | Lagrangian simulation turbulence modeling coal combustion Gas particle flow Experimental test Swirling flow Particle motion Pulverized coal Combustion Trajectory Modeling Lagrangian method |
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References | Görres, Benim, Magel, Schnell (BIB5) 1993 Srinivasan, Mongia (BIB13) 1980 Launder, Spalding (BIB6) 1974; 3 Nakahashi, Deiwert (BIB9) 1986; 24 Melville, Bray (BIB8) 1979; 22 Sommerfeld, Qiu (BIB12) 1993; 19 Görres (BIB3) 1995 Benim (BIB1) 1990; 11 Weber, Dugué, Sayre, Peters, Visser (BIB14) 1992 Boysan, Ayers, Swithenbank (BIB2) 1982; 60 Schnell, Kaess, Brodbek (BIB11) 1993; 93 Görres, Fingerle, Magel, Schnell (BIB4) 1993 Maier, Brodbek, Kaess, Kicherer, Spiegelhalder (BIB7) 1991 Rodi (BIB10) 1976; 56 Melville (10.1016/0142-727X(95)00046-S_BIB8) 1979; 22 Nakahashi (10.1016/0142-727X(95)00046-S_BIB9) 1986; 24 Maier (10.1016/0142-727X(95)00046-S_BIB7) 1991 Weber (10.1016/0142-727X(95)00046-S_BIB14) 1992 Görres (10.1016/0142-727X(95)00046-S_BIB5) 1993 Benim (10.1016/0142-727X(95)00046-S_BIB1) 1990; 11 Launder (10.1016/0142-727X(95)00046-S_BIB6) 1974; 3 Schnell (10.1016/0142-727X(95)00046-S_BIB11) 1993; 93 Sommerfeld (10.1016/0142-727X(95)00046-S_BIB12) 1993; 19 Rodi (10.1016/0142-727X(95)00046-S_BIB10) 1976; 56 Srinivasan (10.1016/0142-727X(95)00046-S_BIB13) 1980 Görres (10.1016/0142-727X(95)00046-S_BIB4) 1993 Boysan (10.1016/0142-727X(95)00046-S_BIB2) 1982; 60 Görres (10.1016/0142-727X(95)00046-S_BIB3) 1995 |
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Snippet | Finite-element computations and measurements of a strongly swirling flow with pulverized coal combustion are presented. The turbulent flow expands into a low... |
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SubjectTerms | Algebra Applied sciences Coal combustion Combustion of solid fuels Combustion. Flame Computational methods Energy Energy. Thermal use of fuels Exact sciences and technology Finite element method Gases Lagrangian simulation Mathematical models Navier Stokes equations Particles (particulate matter) Temperature measurement Theoretical studies. Data and constants. Metering Turbulence turbulence modeling Velocity measurement |
Title | Trajectories of burning coal particles in highly swirling reactive flows |
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