The asymptotic structure of premixed methanol-air flames

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(92)90065-W· OSTI ID:6975040

Yang, B; Seshadri, K ^[1]; Peters, N ^[2]

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1. California Univ., San Diego, La Jolla, CA (United States). Dept. of Applied Mechanics and Engineering Sciences
2. Inst. fur Technische Mechanik, RWTH Aachen, W-5100 Aachen (Germany)

In this paper the asymptotic structure of methanol-air flames is analyzed using a reduced four-step mechanism, for values of equivalence ratio [phi] from 0.52 to 1.0 and values of pressure p from 1 to 10 atm. The reduced mechanism was deduced from a starting mechanism, containing 22 elementary chemical reactions. In the analysis, the overall flame structure is subdivided into four zones---a preheat zone with thickness of order unity, an inner layer with thickness of order unity. The analysis is performed for [delta] [much lt] [epsilon] [much lt] 1.0. The inner layer is located between the preheat zone and the oxidation layer and in this layer, finite-rate reactions related to the consumption of the fuel, to form primarily H[sub 2] and CO and some H[sub 2]O and CO[sub 2], are considered. I the oxidation layer finite-rate reactions related to the oxidation of H[sub 2] and CO to H[sub 2]O and CO[sub 2] are considered. Numerical integration of two coupled, nonlinear, second-order, ordinary differential equations is performed to resolve the structure of the oxidation layer.

• Sponsoring Organization: NSF; National Science Foundation, Washington, DC (United States)
• OSTI ID: 6975040
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 91:3/4; ISSN CBFMAO; ISSN 0010-2180
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800* -- Combustion
Pyrolysis
& High-Temperature Chemistry
661100 -- Classical & Quantum Mechanics-- (1992-)
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AIR
ALCOHOLS
ASYMPTOTIC SOLUTIONS
BURNUP
CHEMICAL REACTIONS
CONSERVATION LAWS
COUPLING
DIFFERENTIAL EQUATIONS
EQUATIONS
FLAMES
FLUIDS
GASES
HYDROXY COMPOUNDS
LAYERS
MATHEMATICAL MODELS
MEDIUM PRESSURE
METHANOL
MIXING
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
OXIDATION
STOICHIOMETRY
VELOCITY