甲烷点火燃烧的简化化学反应动力学模型

Reduced chemical reaction kinetic model for combustion of methane

关键词:  甲烷  燃烧  点火延迟  简化化学反应动力学模型+

Key words:  Methane  Combustion  Ignition delay  Reduced chemical kinetic model~+

摘要:

从甲烷点火燃烧的GR I-M ech 1.2详细化学反应动力学模型出发,采用“准稳态”假设方法来对其进行简化,得到了包含18组分14步总包反应的简化反应模型。通过典型试验结果对比和基于均匀试验设计的校核计算结果比较可以看出,采用“准稳态”假设方法得到的简化反应动力学模型能有效地再现详细基元反应模型的反应机理,具有较高精度,是可靠而有效的。

Abstract:

A reduced chemical kinetic model was obtained by reducing the detailed chemical kinetic model GRI-Mech 1.2 for the combustion of methane based on quasi-stationary state approximation(QSSA).This reduced model is composed of 18 species with 14 global reactions.The comparisons between the reduced model and the typical experimental results were made.Computational results of the reduced model were also compared with that of the detailed model by adopting the uniform experimental design technique.The little difference between these results showed that the reduced model using QSSA has the ability to represent efficiently the reaction mechanisms of detailed element reaction model.Therefore,the reduced model is of high precision and the can be used reliably and efficiently.