湍流燃烧反应机理的简化

采用速率敏感度分析法分别对燃料为CO/H2和CH3OH的钝体绕流湍流扩散火焰的燃烧机理进行了简化.判断出了冗余组分,并通过对敏感度矩阵F的主成分分析,找出了次要反应,使原始的复杂湍流燃烧机理得到了大幅度的简化.简化机理与详细机理的计算结果吻合得很好.结果表明,速率敏感度分析的方法能大大简化复杂的湍流反应机理,且计算效率高,精度满足要求.

Simplification of Reaction Mechanism of Turbulent Combustion

Chemical reaction mechanisms of turbulent non premixed carbon monoxide/hydrogen and methanol bluff body flame were simplified by rate sensitivity analysis method. By identifying the redundant species and unimportant reactions, the reaction kinetics was reduced greatly. Computational results of the reduced mechanisms exhibited good agreement with those of the detailed ones. This proves that the rate sensitivity analysis method can be used to reduce the complicated turbulent reaction mechanisms effectively and at a satisfactory precision.