濃淡燃焼火炎の非定常NO_x生成特性 : 層流濃淡燃焼火炎の非定常数値解析による考察 : 熱工学 , 内燃機関 , 動力

概要

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Recently a lean-rich combustion is drawing attention as a way to decrease the level of NO_x. But the flame structure and NO_x formation process of the lean-rich flame in the unsteady-state was not made clear sufficiently. So we performed the numerical analysis in the unsteady-state in which we took the NO formation mechanism into the consideration by using the Skeletal Chemistry combined with a part of GRI-mech. And we found that thermal NO is generated not only in the high temperature region formed in the downstream of the rich flame, but also in the swell formed in the downstream of the lean flame. In the swell formed in the downstream of the lean flame, the chemical reaction is occurred actively due to the fluctuation of lateral flow that carries CH_4. The faster the lateral flow is, the larger NO mole production rate becomes.
一般社団法人日本機械学会の論文
2001-03-25