Flame Ignition of Premixed Methane Air Mixtures on a High-Temperature Plate

概要

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The flame ignition process of premixed methane-air mixtures on a high-temperature plate was numerically studied by considering 18 species with 61 elementary reactions in a laminar flow. The ignition is mainly controlled by the diffusion phenomena of heat and mass as well as the chemical reactions. The ignition is delayed at the same surface temperature as the equivalence ratio increases from 0.6 to 1.2, being mainly controlled by chemical reactions and only slightly influenced by the main flow velocity from 1 cm/s to 100 cm/s. Decreasing the surface temperature causes the ignition delay. The ignition delay time depends on whether the plate surface is chemically inert or deactivated for active species. Among active species such as H, O, OH and HO_2, H has the greatest effect on the ignition delay time. The ignition delay time increases exponentially as the area of hot surface is decreased.
一般社団法人日本機械学会の論文
1994-02-15