Simulation of OH radical profiles in premixed atmospheric-pressure fat flames
Journal Article
·
· J. Phys. Chem.; (United States)
OH profiles measured in the postflame gases of three propane-air (/phi/ = 0.63, 1.17, 1.46) flames and one (/phi/ = 1.01) methane-air flame at atmospheric pressure are compared with computer-simulated profiles generated by using a 15-reaction chemical mechanism. The simulated profiles deviate from the measured data by less than 15% for all four flames. Sensitivity analyses verify that reactions of the HO/sub 2/ radical determine the shape of the OH decay profile for the lean flame. For stoichiometric and rich flames, the radical recombination reaction (H + OH + M) strongly influences the OH radical profile. Experimental measurements of the CO, H/sub 2/, and O/sub 2/ profiles in lean and stoichiometric flames are also simulated correctly by the mechanism. For the stoichiometric flame, the experimental results verify that the H/sub 2/, O/sub 2/, and OH densities are in partial equilibrium in the postflame gases as predicted. These results provide a set of reaction rate constants and diffusion coefficients which correctly simulate the observed data over a wide range of fuel-air equivalence ratios.
- Research Organization:
- Ford Motor Company, Dearborn, MI (USA)
- OSTI ID:
- 6253282
- Journal Information:
- J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 92:15; ISSN JPCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
DATA
DIFFUSION
DISTRIBUTION
FLAMES
FLUID MECHANICS
FLUIDS
GASES
HYDROCARBONS
HYDRODYNAMICS
HYDROXYL RADICALS
INFORMATION
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROPANE
RADICALS
REACTION KINETICS
SPATIAL DISTRIBUTION
THEORETICAL DATA
THERMOCHEMICAL PROCESSES
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
AIR
ALKANES
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COMBUSTION
DATA
DIFFUSION
DISTRIBUTION
FLAMES
FLUID MECHANICS
FLUIDS
GASES
HYDROCARBONS
HYDRODYNAMICS
HYDROXYL RADICALS
INFORMATION
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
MECHANICS
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PROPANE
RADICALS
REACTION KINETICS
SPATIAL DISTRIBUTION
THEORETICAL DATA
THERMOCHEMICAL PROCESSES