RP-3航空煤油三组分替代燃料简化机理验证

利用机理自动简化程序ReaxRed对航空煤油RP-3三组分替代燃料半详细化学反应动力学模型采用两种方案分别进行了简化。方案一采用直接关系图（directed relation graph,DRG）法构建了109组分423步基元反应，方案二在方案一的结果上采用基于误差传播的DRG（directed relation graph based on error propagation,DRGEP）方法和计算奇异摄动（computational singular perturbation,CSP）法构建了84组分271步基元反应。结合点火延迟试验数据对方案二所构建的简化机理进行了验证，并且采用层流火焰速度、温度和重要产物等方面的数值计算结果进行对比分析，结果表明:方案二所构建的简化机理在简化过程中保留一定的计算精度前提下更加经济实用，其中在各种工况下方案二简化机理和半详细机理的点火延迟时间之间的平均误差在6%以内并且它们在火焰传播速度方面平均误差在不超过8%。采用本生灯预混燃烧器为物理模型，以RP-3航空煤油为燃料，进行相应的试验研究来验证方案二的简化机理，结果表明该简化机理数值计算结果与试验数据较吻合。 

Simplified mechanism verification of three component surrogate fuels for RP-3 aviation kerosene

Two schemes were used in mechanism simplification program ReaxRed to simplify aviation kerosene RP-3 semi-detailed chemical reaction kinetics model of three component surrogate fuels. The first scheme used directed relation graph(DRG) method to obtain 109 species and 423 elementary reactions. The second scheme used directed relation graph based on error propagation(DRGEP) method and computational singular perturbation(CSP) method, which obtained 84 species and 271 elementary reactions on the basis of the result of the first scheme. The experimental data of ignition delay of kerosene was adopted to demonstrate the rationality of the simplified mechanism created by the second scheme, the numerical simulation results of laminar flame speed, temperature and mole fraction of important product were compared and analyzed. Results indicated that the second scheme with high calculation accuracy was more economical and practical compared with the first scheme. Under various operating conditions, the average error between the ignition delay time of the second schemes simplified mechanism and the ignition delay time of the semi-detail mechanism was within 6% and their error in the flame propagation speed did not exceed 8%. In order to further verify the simplified mechanism of the second scheme, RP-3 aviation kerosene was adopted as fuel and an experimental study of premixed burner of the Bunsen burner was conducted. The results showed that the numerical calculation results of the simplified mechanism were consistent with the experimental data.