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采用六种直接关系图类(DRG)方法对包含253个物种和1542个反应的Aramco Mech 1.3机理进行简化,并通过对所得到的六种简化机理取交集,最终得到包含81个物种和497个反应的框架机理。所得81个物种框架机理的点火延迟时间最大误差与其简化方法得到的框架机理最大误差相比并没有显著增加;这表明从不同简化方法的框架机理结果取交集可以有效去除冗余物种。基于81个物种框架机理模拟的双组分混合燃料的点火延迟时间与详细机理机理结果吻合很好。同时该框架机理在不同反应器中的模拟结果验证了温度、物种浓度分布和火焰等燃烧特性。元素流动分析结果表明,81个物种框架机理精确地再现了详细机理的燃烧反应路径。保留了详细机理的所有重要反应路径和层级结构,能够很好地再现C_1-C_2燃料的各种燃烧特性。因此,基于该81个物种框架机理可作为核心机理用于发展大分子烃类或含氧燃料的燃烧机理。
Six mechanisms of Aramco Mech 1.3, including 253 species and 1542 reactions, were simplified using six direct relational graph (DRG) methods and intersected with the six simplified mechanisms resulting in a total of 81 species and 497 The framework of the reaction mechanism. The maximum error of the ignition delay time of the 81 species framework mechanisms did not significantly increase compared with the maximum error of the simplified framework mechanism. This indicates that the redundancy can be effectively removed from the frame mechanism results of different simplified methods. The ignition delay time of two-component hybrid fuel based on the framework of 81 species models is in good agreement with the detailed mechanism and mechanism. At the same time, the simulation results of the framework mechanism in different reactors verified the combustion characteristics of temperature, species concentration distribution and flame. The elemental flow analysis results show that 81 species framework mechanisms accurately reproduce the detailed mechanism of the combustion reaction path. All of the important reaction pathways and hierarchy of the detailed mechanisms are retained, and the various combustion characteristics of C 1 -C 2 fuels are well reproduced. Therefore, the 81 species framework mechanism can be used as a core mechanism to develop the combustion mechanism of macromolecular hydrocarbons or oxygenated fuels based on the 81 species frameworks.