RP-3航空煤油/O_(2)的简化反应机理优化与验证

Optimization and Verification of Reduced Reaction Mechanism of RP-3 Kerosene/Oxygen

采用RP-3航空煤油的简化反应机理对多工况条件下RP-3航空煤油/氧气混合物的氧化、着火延迟与层流燃烧特性进行了数值计算,并与相应试验数据进行了对比验证;同时,采用敏感性分析方法对该简化反应机理中燃料相关骨架反应机理中的基元反应进行了敏感性分析;采用遗传算法,对重要的基元反应速率常数进行优化,形成了优化后的RP-3航空煤油/氧气混合物的简化反应机理.结果表明,大部分工况条件下初始简化反应机理对RP-3航空煤油/氧气混合物氧化过程中主要组分浓度、着火延迟时间以及层流燃烧速度的预测值与相应试验值存在较大误差.同时,优化后的简化反应机理对多工况条件下RP-3航空煤油/氧气混合物氧化过程中的主要组分浓度、着火延迟时间及层流燃烧速度的预测值与相应试验值吻合较好.

The oxidation,ignition delay and laminar combustion characteristics of RP-3 kerosene/O_(2) mixture were simulated by the reduced reaction mechanism of RP-3 kerosene under multiple conditions,and the simulated results were compared with the corresponding experimental data.At the same time,the sensitivity analysis method was used to analyze the elementary reactions of the fuel related skeleton reaction mechanism in the reduced reaction mechanism.Furthermore,genetic algorithm was used to optimize the rate constants of important elementary reactions,and the optimized reduced reaction mechanism of RP-3 kerosene/O_(2) mixture was formed.The results show that the predicted values of main species concentration during the oxidation process,ignition delay time and laminar combustion speed of RP-3 kerosene/O_(2) mixture by the initial reduced reaction mechanism show great discrepancies with the corresponding experimental data under most operating conditions,while those by the optimized reduced reaction mechanism are in good agreement with the corresponding experimental data under multiple operating conditions.