RP-3航空煤油3组分模拟替代燃料燃烧反应机理

提出了一种包括65%正癸烷、10%甲苯与25%丙基环己烷3组分的RP-3航空煤油模拟替代燃料的燃烧反应机理，该机理由150种组分和591个基元反应组成.采用该燃烧反应机理对RP-3航空煤油模拟替代燃料在激波管和定容燃烧弹中的着火与燃烧特性进行数值模拟，并与相应工况实验数据进行对比分析.通过与RP-3航空煤油单组分正癸烷模拟替代燃料的燃烧反应机理进行对比分析发现:正癸烷、甲苯与丙基环己烷3组分替代燃料的燃烧反应机理对着火延迟时间的计算偏差能够控制在5%以内，对层流燃烧速度的计算偏差能够控制在10%以内，计算值明显优于正癸烷单组分替代燃料；进一步采用敏感性分析方法对3组分模拟替代燃料的燃料反应机理进行了适当修正，修正后机理对层流燃烧速度的计算偏差由10%提高到5%以内，能够更好预测所研究参数下的RP-3航空煤油的着火延迟时间和层流燃烧速度. 

Combustion reaction mechanism of three-component simulation surrogate fuel for RP-3 kerosene

A kind of combustion reaction mechanism of surrogate fuel was developed, including 65% n-decane, 10% toluene and 25% propyl cyclohexane for RP-3 kerosene. The mechanism consisted of 150 species and 591 elementary reactions. The ignition and combustion characteristics of surrogate fuel at various conditions were simulated by this reaction mechanism, and the simulation results were compared with those of another one-component surrogate fuel (n-decane) and the experimental data, respectively. Results show that the chemical reaction mechanism of three-component surrogate fuel can accurately calculate the ignition and combustion characteristics of RP-3 kerosene. The calculation deviation of the ignition delay time can be controlled within 5%, and the calculation error of the laminar burning velocity can be controlled within 10%, better than those of n-decane. The combustion reaction mechanism of three-component surrogate fuel was also modified by sensitivity analysis, showing that the calculation error of the laminar burning velocity was improved from 10% to 5%. This means the modified mechanism can predict the ignition delay time and laminar burning velocity of RP-3 kerosene better.