Comparative Study on Ignition Characteristics of 1-Hexene and 2-Hexene behind Reflected Shock Waves
Comparative Study on Ignition Characteristics of 1-Hexene and 2-Hexene behind Reflected Shock Waves
复制标题
反射冲击波下1-己烯和2-己烯着火特性的对比研究
DOI：
10.1021/acs.energyfuels.5b02910
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发表时间：
2016
期刊：
影响因子：
5.3
通讯作者：
Zuohua Huang
中科院分区：
文献类型：
--
作者：
Feiyu Yang;Fuquan Deng;Peng Zhang;Erjiang Hu;Yu Cheng;Zuohua Huang
在这项工作中，研究了反射冲击波后 1-己烯和 2-己烯的点火特性。 1-己烯和2-己烯的点火延迟时间是在P= 1.2-10 atm、Φ= 0.5-2.0、T= 1020-1900 K、固定燃料浓度为0.5%时测量的。实验结果表明，2-己烯在高温区比1-己烯具有更短的着火延迟时间和更高的反应活性，并且这种差异随着当量比的减小而增大。动力学分析表明，不同的反应活性主要是由于1-己烯体系中共振稳定的C3H5-A自由基浓度较高。采用NUIG和LLNL机制进行仿真。对于 1-己烯和 2-己烯，NUIG 机制在所有测试条件下都给出了相当好的预测。路径分析表明，1-己烯和2-己烯氧化分别以C-C裂变和H加成反应为主。敏感性分析表明，1-己烯着火对小分子反应敏感，2-己烯着火主要对与燃料相关的反应敏感。
In this work, ignition characteristics of 1-hexene and 2-hexene are investigated behind reflected shock waves. The ignition delay times of 1-hexene and 2-hexene are measured atP= 1.2–10 atm, Φ = 0.5–2.0, andT= 1020–1900 K with a fixed fuel concentration of 0.5%. The experimental results show that 2-hexene has shorter ignition delay times and higher reactivity than 1-hexne at high temperature region, and this difference increases with the decrease in equivalence ratio. Kinetic analysis shows that the different reactivity is mainly due to the higher concentration of resonance stabilized C3H5-A radical in 1-hexene system. The NUIG and LLNL mechanisms are adopted for simulation. For both 1-hexene and 2-hexene, the NUIG mechanism presents reasonably good predictions under all of the tested conditions. Pathway analysis exhibits that 1-hexene and 2-hexene oxidation is dominated by C–C fission and H-addition reactions, respectively. Sensitivity analysis indicates that 1-hexene ignition is sensitive to small molecular reactions and 2-hexene ignition is mainly sensitive to the reactions associated with the fuel.