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通过对一种航空煤油数值模拟替代燃料(正癸烷)着火与燃烧的化学反应详细机理(包括67种组分,344个反应)进行反应流与敏感性分析,建立了该替代燃料的化学反应简化机理(包括50种组分,118个反应).分别采用详细机理与简化机理对正癸烷在激波管中的着火延迟时间、在预混燃烧炉内的燃烧过程进行了数值计算,并与实验结果进行了对比分析.结果表明:与实验数据相比,采用详细机理与简化机理计算得到的着火延迟时间、反应物与主要生成物的摩尔分数与炉壁距离的整体变化趋势吻合较好.正癸烷可以作为航空煤油的一种数值模拟替代燃料,同时,所建立的化学反应简化机理能很好的描述正癸烷着火与燃烧的动力学特性.
The reaction flow and sensitivity analysis of a kerosene jet fuel numerical simulation of the mechanism of chemical reaction of fuel (n-decane) ignition and combustion (including 67 components and 344 reactions) were carried out to establish the chemical reaction of the alternative fuel (Including 50 components and 118 reactions). The ignition delay time of n-decane in shock tube was calculated by the detailed mechanism and the simplified mechanism respectively. The combustion process in the premixed combustion furnace was numerically calculated. The results show that compared with the experimental data, the ignition delay time calculated by the detailed mechanism and the simplified mechanism is in good agreement with the overall change of the molar fraction of reactants and main products and the furnace wall distance N-Decane can be used as a kind of numerical simulation alternative fuel for aviation kerosene, meanwhile, the simplified mechanism of chemical reaction can well describe the kinetic characteristics of n-decane ignition and combustion.