Bifurcation behavior in homogeneous-heterogeneous combustion. Part 2; Computations for stagnation-point flow

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Combustion and Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(91)90007-X· OSTI ID:5151505

Song, X; Williams, W R; Schmidt, L D; Aris, R ^[1]

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1. Dept. of Chemical Engineering and Materials Science, Univ. of Minnesota, Minneapolis, MN (US)

Bifurcation analysis of ignition and extinction of combustion in stagnation-point flow was carried out for conditions when both homogeneous and heterogeneous reactions can occur. A technique based on the bifurcation theory and the shooting algorithm is developed, which permits fast and efficient tracking of bifurcation in these systems. The influences of the different parameters on the ignition and extinction behavior were investigated by assuming (1) only catalytic surface (heterogeneous) reaction, (2) only homogeneous reaction on a hot inert surface, and (3) both surface and homogeneous reactions. The coupling effects of the homogeneous and heterogeneous reactions are clearly demonstrated. It is shown that the heterogeneous reaction dominates the system behavior at the lower temperature while both homogeneous and heterogeneous reactions play important role at higher temperature. It is predicted that the homogeneous ignition temperature is higher with surface reaction than without surface reaction. However, homogeneous-heterogeneous or homogeneous reaction alone. The numerical results for propane and for methane oxidation on platinum foil also show good qualitative agreements with the experimental results of Part I of this article, which include the two types of ignition, extinction and autothermal behavior of homogeneous-heterogeneous reactions.

• OSTI ID: 5151505
• Journal Information: Combustion and Flame; (United States), Journal Name: Combustion and Flame; (United States) Vol. 84:4; ISSN CBFMA; 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
ALKANES
BEHAVIOR
CHEMICAL REACTIONS
COMBUSTION
ELEMENTS
FLOW MODELS
FOILS
FUELS
HYDROCARBONS
IGNITION
KINETICS
MATHEMATICAL MODELS
METALS
METHANE
ORGANIC COMPOUNDS
OXIDATION
PLATINUM
PLATINUM METALS
PROPANE
REACTION KINETICS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS