Revised users manual, Pulverized Coal Gasification or Combustion: 2-dimensional (87-PCGC-2): Final report, Volume 2. [87-PCGC-2]
A two-dimensional, steady-state model for describing a variety of reactive and non-reactive flows, including pulverized coal combustion and gasification, is presented. Recent code revisions and additions are described. The model, referred to as 87-PCGC-2, is applicable to cylindrical axi-symmetric systems. Turbulence is accounted for in both the fluid mechanics equations and the combustion scheme. Radiation from gases, walls, and particles is taken into account using either a flux method or discrete ordinates method. The particle phase is modeled in a Lagrangian framework, such that mean paths of particle groups are followed. Several multi-step coal devolatilization schemes are included along with a heterogeneous reaction scheme that allows for both diffusion and chemical reaction. Major gas-phase reactions are modeled assuming local instantaneous equilibrium, and thus the reaction rates are limited by the turbulent rate mixing. A NO/sub x/ finite rate chemistry submodel is included which integrates chemical kinetics and the statistics of the turbulence. The gas phase is described by elliptic partial differential equations that are solved by an iterative line-by-line technique. Under-relaxation is used to achieve numerical stability. The generalized nature of the model allows for calculation of isothermal fluid mechanicsgaseous combustion, droplet combustion, particulate combustion and various mixtures of the above, including combustion of coal-water and coal-oil slurries. Both combustion and gasification environments are permissible. User information and theory are presented, along with sample problems. 106 refs.
- Research Organization:
- Brigham Young Univ., Provo, UT (USA). Combustion Lab.
- DOE Contract Number:
- AC21-85MC22059
- OSTI ID:
- 5112225
- Report Number(s):
- DOE/MC/22059-2570-Vol.2; ON: DE88001071
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
COAL
COMBUSTION
COAL GASIFICATION
MATHEMATICAL MODELS
P CODES
CHEMICAL REACTIONS
COMPUTER CODES
COMPUTERIZED SIMULATION
DEVOLATILIZATION
DIFFUSION
FLUID MECHANICS
FUEL SLURRIES
NUMERICAL SOLUTION
PROGRESS REPORT
PULVERIZED FUELS
RADIANT HEAT TRANSFER
STEADY-STATE CONDITIONS
TURBULENCE
TWO-DIMENSIONAL CALCULATIONS
CARBONACEOUS MATERIALS
DISPERSIONS
DOCUMENT TYPES
ENERGY SOURCES
ENERGY TRANSFER
FOSSIL FUELS
FUELS
GASIFICATION
HEAT TRANSFER
MATERIALS
MECHANICS
MIXTURES
OXIDATION
SIMULATION
SLURRIES
SUSPENSIONS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
014000 - Coal
Lignite
& Peat- Combustion
990220 - Computers
Computerized Models
& Computer Programs- (1987-1989)