Abstract Pressurized oxy-fuel combustion is considered to be a new generation of oxy-fuel combustion technology owing to its low emission and high efficiency. In this study, the ignition delay times (IDTs) for propane under O2/CO2/Ar atmospheres were measured in a shock tube at varying pressures and equivalence ratios. A chemical kinetic model (OXYMECH 2.0) for pressurized oxy-fuel combustion was developed by updating several key elementary reactions in our previous model (OXYMECH 1.0). OXYMECH 2.0 was validated based on experimentally measured IDTs for methane, ethane, and propane in O2/CO2, O2/N2, and O2/Ar atmospheres in a pressure range of 1–250 atm, as well as laminar flame speeds (LFSs) in pressure and temperature ranges of 1–4 atm and 298–543 K, respectively. The OXYMECH 1.0, Aramco 3.0, CRECK, and DTU models were also evaluated; the results indicate that OXYMECH 2.0 performs better than other models in terms of predicting the IDTs and LFSs of C1–C3 alkanes in O2/CO2 and O2/N2 atmospheres. A detailed comparison between the OXYMECH 2.0 and Aramco 3.0 models was also performed. The influences of the pressure, equivalence ratio, and CO2 concentration on the IDTs of propane were analyzed in detail.

中文翻译：

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O2/CO2/Ar气氛下丙烷点火延迟时间的激波管及模型研究

摘要 加压富氧燃烧具有排放低、效率高等优点，被认为是新一代的富氧燃烧技术。在这项研究中，丙烷在 O2/CO2/Ar 气氛下的点火延迟时间 (IDT) 在冲击管中以不同的压力和当量比进行测量。通过更新我们之前的模型 (OXYMECH 1.0) 中的几个关键元素反应，开发了用于加压氧燃料燃烧的化学动力学模型 (OXYMECH 2.0)。OXYMECH 2.0 基于实验测量的甲烷、乙烷和丙烷在 1-250 个大气压范围内的 O2/CO2、O2/N2 和 O2/Ar 气氛中的 IDT 以及层流火焰速度 (LFS) 进行验证。压力和温度范围分别为 1-4 个大气压和 298-543 K。还评估了 OXYMECH 1.0、Aramco 3.0、CRECK 和 DTU 模型；结果表明，OXYMECH 2.0 在预测 O2/CO2 和 O2/N2 气氛中 C1-C3 烷烃的 IDT 和 LFS 方面比其他模型表现更好。还对 OXYMECH 2.0 和 Aramco 3.0 模型进行了详细比较。详细分析了压力、当量比和CO2浓度对丙烷IDTs的影响。