Numerical study of coal dust explosions in spherical vessels

Conference · Fri Jan 01 04:00:00 EST 1988 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA)

OSTI ID:5339273

Continillo, G ^[1]

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1. Univ. of California, Irvine (USA)

The unsteady flame propagation through a coal dust-air suspension in a spherical enclosure is studied by means of a one-dimensional, spherically-symmetric mathematical model. An Eulerian formulation is adopted for the gas phase mass continuity, species and energy balance equations, while a Lagrangian formulation is employed for the mass, energy and momentum balance equations for the particles. The pressure is assumed to be uniform in space (low Mach number) but varies in time. Preliminary calculations have been performed with a very simple coal particle submodel, in which a single-step devolatilization reaction with Arrhenius-type kinetics and quasi-steady heat, mass and momentum transfer to/from the particles is considered. Coal dust-air flame propagation could be predicted on the basis of devolatilization and homogeneous combustion reaction only. The model can represent a useful framework for the development and validation of particle-scale models, to be implemented in more complex coal combustion situations.

• OSTI ID: 5339273
• Report Number(s): CONF-8806317--
• Conference Information: Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA) Journal Volume: 33:2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
AIR
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL FINES
COMBUSTION KINETICS
DECOMPOSITION
DEVOLATILIZATION
DISPERSIONS
DUSTS
ENERGY SOURCES
EQUATIONS
EXPLOSIONS
FLAME PROPAGATION
FLUIDS
FOSSIL FUELS
FUELS
GASES
IGNITION
KINETIC EQUATIONS
KINETICS
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
MIXTURES
MOMENTUM TRANSFER
ONE-DIMENSIONAL CALCULATIONS
PRESSURE DEPENDENCE
PYROLYSIS
REACTION KINETICS
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TIME DEPENDENCE