CH4/空气含氮燃烧的14步简化机理

从含氮的详细机理GRI2-11出发，通过分析确定了主要物质后，利用敏感性分析和自动简化机理的计算程序，构造出一套含氮反应的CH4/空气燃烧14步总包简化机理，该简化机理包括18种组分和14个总包反应，其中，总包反应速率通过准稳态假设由准稳态物质的关系式来确定。利用良搅拌反应器和层流预混火焰的燃烧问题对其进行了检验。通过与详细机理的计算结果比较表明，该简化机理能在大范围热力学参数变化范围内很好地预测燃烧现象以及NO的生成量。

A 14-STEP REDUCED MECHANISM FOR METHANE/AIR COMBUSTION WITH NO FORMATION

A new set of reduced global mechanism with NOx formation has been developed for methane oxidation from the detailed mechanism GRI2-11 using a computer algorithm for automatic generation of reduced chemistry, after selecting the non-steady-state species. The global mechanism, consisting of 18 species and 14 lumped reaction steps, is based on the sensitivity analysis and the quasi-steady-state approximation. The 14-step reduced mechanism is then used in perfectly stirred reactor and laminar premixed flame, the results show that it exhibits good to excellent performance in predicting a wide range of combustion phenomena and the formation of NO under extensive thermodynamic parametric variations, compared with the results of the detailed mechanism GRI2.11.