Flame Structure of Lean-Rich Combustion in Unsteady-State. Numerical Unsteady-State Analysis of Laminar Lean-Rich Combustion Flames.

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  • 濃淡燃焼火炎の非定常火炎構造　　層流濃淡燃焼火炎の非定常数値解析による考察
  • ノウタン ネンショウ カエン ノ ヒテイジョウ カエン コウゾウ ソウリュウ ノウタン ネンショウ カエン ノ ヒテイジョウ スウチ カイセキ ニ ヨル コウサツ

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Abstract

Recently a lean-rich combustion is drawing attention as a way to decrease the level of NOχ. In the lean-rich combustion flame, the oscillation and the noise is generated by the velocity difference between the lean-side flame and the rich-side flame. This oscillation and the flame structure in the unsteady-state have not been made clear. Numerical unsteady-state analysis was performed in order to make clear the flame structure of the methane-air lean-rich combustion flame in unsteady-state. In the 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 skeletal chemistry proposed by Smooke M.D.which includes 35 elementary reactions of 16 chemical species.

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