A comprehensive model for pilot-ignited, coal-water mixture combustion in a direct-injection diesel engine

Journal Article · Sun Jul 01 00:00:00 EDT 1990 · Journal of Engineering for Gas Turbines and Power; (United States)

DOI:https://doi.org/10.1115/1.2906506· OSTI ID:5661938

Wahiduzzaman, S; Blumberg, P N; Keribar, R; Rackmil, C I ^[1]

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1. Ricardo-ITI, Inc., Westmont, IL (US)

This paper reports on a combustion model developed for a direct-injected diesel engine fueled with coal-water slurry mixture (CWM) and assisted by diesel pilot injection. The model combines the unique heat and mass transport and chemical kinetic processes of CWM combustion with the normal in-cylinder processes of a diesel engine. It includes a two-stage evaporation submodel for the drying of the CWM droplet, a global kinetic submodel for devolatilization, and a char combustion submodel describing surface gasification by oxygen, carbon dioxide, and water vapor. The combustion volume is discretized into multiple zones, each of whose individual thermochemistry is determined by in-situ equilibrium calculations. This provides an accurate determination of the boundary conditions for the CWM droplet combustion submodels and the gas phases heat release.

• OSTI ID: 5661938
• Journal Information: Journal of Engineering for Gas Turbines and Power; (United States), Vol. 112:3; ISSN 0742-4795
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
01 COAL, LIGNITE, AND PEAT
COAL
COMBUSTION KINETICS
FUEL SLURRIES
DIESEL ENGINES
PERFORMANCE TESTING
DIESEL FUELS
CHEMICAL REACTION KINETICS
COMPUTER CODES
DESIGN
DUAL-FUEL ENGINES
FUEL INJECTION SYSTEMS
FUNCTIONAL MODELS
MASS TRANSFER
MIXTURES
MODIFICATIONS
STAGED COMBUSTION
WATER VAPOR
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COMBUSTION
DISPERSIONS
ENERGY SOURCES
ENGINES
FLUIDS
FOSSIL FUELS
FUEL SYSTEMS
FUELS
GAS OILS
GASES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
KINETICS
LIQUID FUELS
MATERIALS
OXIDATION
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
REACTION KINETICS
SLURRIES
SUSPENSIONS
TESTING
THERMOCHEMICAL PROCESSES
VAPORS
330102* - Internal Combustion Engines- Diesel
330603 - Vehicle Design Factors- Engine System
014000 - Coal
Lignite
& Peat- Combustion