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Role of atomic hydrogen diffusion in a hydrogen flame
Authors:V. A. Bunev  V. N. Panfilov  V. S. Babkin
Affiliation:(1) Institute of Chemical Kinetics and Combustion, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090
Abstract:A numerical modeling study of the propagation of a laminar flat homogeneous gas flame has shown that in a hydrogen-air flame, a rapid increase in the concentration of OH radicals begins in the range of low temperatures and the concentration profile has two maxima. The first maximum in the low-temperature region of the front is related to the diffusion of H atoms, formation of HO2 radicals, and the quadratic branching reaction H + HO2 → OH + OH. The second maximum in the OH concentration profile is due to the classical high-temperature branching reactions H + O2 → OH + O and O + H2 → OH + H. __________ Translated from Fizika Goreniya i Vzryva, Vol. 43, No. 2, pp. 3–9, March–April, 2007.
Keywords:chain avalanche  flame propagation  diffusion  hydrogen atoms  quadratic branching
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