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为了建立可靠的燃料替代模型,本文选择了正癸烷以及甲苯作为链烷烃与芳香烃的代表,系统研究了这两种燃料混合物的非稳态着火过程,分析了燃料中甲苯含量以及标量扩散率对着火延迟时间的影响。研究结果显示,较大的甲苯含量以及标量扩散率都会增加系统的着火延迟时间。文中揭示了由甲苯含量变化导致的化学反应特性以及由拉伸率变化导致的输运特性对着火过程的影响。
In order to establish a reliable alternative fuel model, n-decane and toluene were selected as the representatives of paraffins and aromatic hydrocarbons. The unsteady ignition process of these two fuel mixtures was systematically investigated. The toluene content in the fuel and the scalar diffusion rate Impact on fire delay time. The results show that the larger toluene content and the scalar diffusion rate will increase the ignition delay of the system. The article reveals the chemical reaction characteristics caused by the change of toluene content and the influence of the transport characteristics caused by the change of elongation on the ignition process.