基于敏感性分析的氧/甲烷燃烧反应简化机理

为研究液氧/甲烷火箭发动机中甲烷在纯氧中的燃烧性能,通过敏感性分析方法,得到对平衡温度及组分浓度有重要影响的反应过程,从而构造出一套氧/甲烷燃烧的10步12组分简化反应机理.利用CHEMKIN 4.1中完全搅拌反应器对简化机理进行研究与检验.计算结果表明:简化反应机理在平衡温度和主要组分浓度的预测上与详细反应机理表现出良好的一致性,在较大范围内很好地反映了氧/甲烷的燃烧,为进一步高效准确研究甲烷在燃烧室中的流场奠定基础.

Reduced mechanism for oxygen/methane combustion based on sensitivity analysis

To investigate the oxygen/methane combustion in liquid rocket engine,a new set of reduced mechanism was developed for oxygen/methane based on sensitivity analysis.The reduced mechanism was then used in perfectly stirred reactor (PSR) of CHEMKIN 4. 1. The results show that the proposed kinetic mechanism shows good concordances with the detailed mechanism in the prediction of equilibrium temperature and major components concentration.The proposed reduced mechanism well reflects the oxygen/methane combustion in a wide range,laying the foundation for further efficient and accurate study of methane in the combustion chamber flow field.