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.
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