伸長するメタン空気対向流拡散火炎のN0_χの生成機構に関する研究

概要

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The effect of strain rate on NO_χ emissions in a methane air counterflow diffusion flame is numerically analyzed with detailed chemistry. First, the kinetic mechanism is revised and tested by introducing ammonia into the fuel. Comparison of the experimental results with the computed results showed that NO formation is well predicted by the present detailed chemistry. NO_χ formation at high air temperature is then calculated by increasing the strain rate from 10s^<-1> to 12800s^<-1>. The results showed that NO_χ emission decreases dramatically with the increase of strain rate and that extinction limit is greatly extended with the increase of air temperature. Furthermore, the sensitivity and production rate analyses are made. Important elementary reactions and formation routes corresponding to NO_χ emissions at different strain rates are presented and discussed. Comparisons between prompt NO_χ and thermal NO_χ are made. Quenches of thermal NO_χ and NCO and CN recycle routes at high strain rate are identified.
一般社団法人日本機械学会の論文
1996-07-25