Comparative Study on Ignition Delay Times of C1–C4 Alkanes
Comparative Study on Ignition Delay Times of C1–C4 Alkanes
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DOI：
10.1021/ef400496a
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发表时间：
2013-05
期刊：
影响因子：
5.3
通讯作者：
Jiaxiang Zhang;Erjiang Hu;Zihang Zhang;Lun Pan;Zuo-hua Huang
中科院分区：
文献类型：
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作者：
Jiaxiang Zhang;Erjiang Hu;Zihang Zhang;Lun Pan;Zuo-hua Huang
用氩气稀释的 C1-C4 烷烃（甲烷、乙烷、丙烷和正丁烷）的点火延迟时间分别在相同当量比（Φ = 1.0）和不同压力（1.2 和 5.3 atm）和温度（1100-2100 K）下在反射冲击波后测量。采用相同的氩气稀释比以获得合理的比较。首先，与之前的数据进行比较时，注意了具体的实验条件。随后，使用了两种广泛使用的模型 USC 2.0 和 NUI C4，并根据实验数据进行了验证。据观察，甲烷和乙烷分别具有最长和最短的着火延迟时间，而丙烷和正丁烷则具有中间值。除了 USC 2.0 模型对乙烷的预测较差之外，这两个模型都与 C1-C4 烷烃的点火数据相当吻合。最后，通过反应路径和灵敏度分析来确定USC 2.0模型中乙烷点火过程中的控制步骤。
Ignition delay times of C1–C4 alkanes (methane, ethane, propane, and n-butane) diluted with argon were respectively measured behind reflected shock waves at the same equivalence ratio (ϕ = 1.0) and different pressures (1.2 and 5.3 atm) and temperatures (1100–2100 K). A same argon-dilution ratio was employed to obtain a reasonable comparison. First, attention was paid on the specific experimental conditions when compared to previous data. Subsequently, two widely used models, USC 2.0 and NUI C4, were used and validated against the experimental data. It was observed that methane and ethane respectively have the longest and the shortest ignition delay times while propane and n-butane show the intermediate values. Both models yield fairly good agreement with the ignition data of C1–C4 alkanes, except the poor prediction of ethane by the USC 2.0 model. Finally, reaction pathway and sensitivity analysis were performed to ascertain the controlling steps during the ignition of ethane in the USC 2.0 model.