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在化学激波管中对RP-3航空煤油的着火特性进行了实验测量,获得了多工况下RP-3航空煤油的着火延迟时间.根据RP-3航空煤油的化学组成及物理特性,提出了由体积分数分别为0.65,0.1,0.25的正癸烷、甲苯与丙基环己烷3种组分组成的模拟替代燃料,并形成了该模拟替代燃料的化学反应详细机理.采用该化学反应详细机理对该模拟替代燃料在化学激波管中多工况下的着火特性进行了数值计算,并与实验数据进行了对比分析.结果表明:在不同压力与当量比下,RP-3航空煤油着火延迟时间的对数与着火温度的倒数呈线性关系,并且随着火温度与压力的升高以及当量比的降低,着火延迟时间逐渐缩短;同时,在各工况下采用该化学反应机理计算得到的该模拟替代燃料着火延迟时间与RP-3航空煤油着火延迟时间的实验值吻合良好.
The ignition characteristics of RP-3 aviation kerosene were experimentally measured in a chemical shock tube, and the ignition delay time of RP-3 aviation kerosene under multi-working conditions was obtained.According to the chemical composition and physical properties of RP-3 aviation kerosene, A simulated alternative fuel consisting of three components, n-decane, toluene and propylcyclohexane with volume fractions of 0.65, 0.1 and 0.25, respectively, formed the detailed mechanism of the chemical reaction of the simulated alternative fuel.The chemical reaction The detailed mechanism is used to calculate the ignition characteristics of the simulated alternative fuel in chemical shock tube under multi-working conditions and compared with the experimental data.The results show that under different pressures and equivalence ratios, RP-3 aviation kerosene The logarithm of the ignition delay time is linear with the reciprocal of the ignition temperature, and the ignition delay time is shortened with the increase of the temperature and pressure of the fire and the reduction of the equivalence ratio. At the same time, the chemical reaction mechanism is used to calculate the logarithm of the ignition delay time The simulation of alternative fuel ignition delay time and RP-3 aviation kerosene ignition delay time experimental values ?? in good agreement.