濃淡燃焼火炎のNO_χ生成特性 : 層流濃淡燃焼火炎の定常数値解析による考察

概要

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Nemerical steady-state analysis was performed in order to make clear the flame structure and the formation process of NO_χ in the methane-air lean-rich combustion flame. In lean-rich flames, the lean and the rich slit burners were set side by side in the combustor. A two-dimensional numerical analysis was performed based on 235 elementary rections with 52 chemical species, using the CHEMKIN thermodynamic database. In the numerical analysis, both Zeldovich NO and prompt NO formation mechanism were taken into account for NO formation process. We found the region in the base of the lean flame where the chemical reaction occurred actively. It concludes that the region was formed by the diffusion of fuel and various radicals from the rich flame, and by thermal influence from the rich flame. It was the evidence that the rich flame influenced the lean flame. This result is useful not only for decreasing the level of NO_χ but also for stabilizing the lean-rich flame.
一般社団法人日本機械学会の論文
2000-03-25