摘要
提出了一套用于描述甲烷 -空气层流预混火焰的含有 N化学和 C2 化学反应的半详细化学动力学机理 ,由79个基元反应和 32种物质组成 ,根据需要可进一步简化。计算和实验结果对比表明 ,该机理能合理描述火焰结构和传播速度 ,其中 N化学对火焰传播速度没有影响 ,C2 化学在富油时会提高传播速度。对 N化学反应的计算分析表明 ,在不同当量比条件下 ,NOx 可由不同含 N物质所组成 ,调整 CH+N2 =HCN+N的速率常数可改变 NOx 的生成浓度。
A semi-detailed chemical kinetic mechanism contain N and C2 chemical reaction for describing methane-air laminar premixed flame is proposed, including 79 element reactions and 32 species. It can be simplified according to practical problems. Comparisons between computations and experiments indicate that the mechanism can describe the structure and propagating speed of the flame reasonably, and N chemistry has no influence on flame propagating speed, while C2 chemistry can increase it at rich-fuel. Computations and analysis for N chemistry indicate that NOx can be composed of different N-containing species at different equivalence ratios, and adjustment for rate coefficient of CH+N2=HCN+N has influence on formation concentration of NOx.
出处
《燃烧科学与技术》
EI
CAS
CSCD
2002年第1期44-48,共5页
Journal of Combustion Science and Technology
基金
华中理工大学煤燃烧国家重点实验室 973国家重点基础研究专项经费资助项目
