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Experimental and kinetic study of 2,4,4-trimethyl-1-pentene and iso-octane in laminar flames
Proceedings of the Combustion Institute ( IF 3.4 ) Pub Date : 2018-06-21 , DOI: 10.1016/j.proci.2018.05.008
Erjiang Hu , Geyuan Yin , Jinfeng Ku , Zhenhua Gao , Zuohua Huang

Laminar flame speeds of 2,4,4-trimethyl-1-pentene are investigated at equivalence ratios of 0.7–1.6, initial temperatures of 298–453 K and initial pressures of 0.1–0.5 MPa. The comparison between 2,4,4-trimethyl-1-pentene and iso-octane is also performed. Results show that 2,4,4-trimethyl-1-pentene has faster laminar flame speed than iso-octane. Chemical kinetic models (Metcalfe model, Modified model I) were tested against the present experimental data. The laminar flame speeds are apparently over-estimated by the Metcalfe model and under-predicted by the Modified model I. Therefore, high-level quantum mechanical calculations were used to revise the Modified model I to obtain Modified model II and it can give fairly good prediction at various conditions on laminar flame speeds. In addition, the chemical kinetic analysis was conducted. The analysis indicates both thermal and kinetic effects result in the discrepancy of laminar flame speeds between 2,4,4-trimethyl-1-pentene and iso-octane. Furthermore, IC4H8 plays a dominant role in laminar flame speeds of 2,4,4-trimethyl-1-pentene and iso-octane.



中文翻译:

2,4,4-三甲基-1-戊烯和异辛烷在层流火焰中的实验和动力学研究

研究了当量比为0.7-1.6,初始温度为298-453 K和初始压力为0.1-0.5 MPa时的2,4,4-三甲基-1-戊烯的层流火焰速度。还进行了2,4,4-三甲基-1-戊烯和异辛烷的比较。结果表明,2,4,4-三甲基-1-戊烯的层流火焰速度比异辛烷快。针对目前的实验数据测试了化学动力学模型(Metcalfe模型,修改后的模型I)。层流火焰速度显然被Metcalfe模型高估,而被修改模型I预测不足。因此,使用高级量子力学计算对修改模型I进行修改,以获得修改模型II,它可以给出很好的结果。在不同条件下对层流火焰速度的预测。另外,进行了化学动力学分析。分析表明,热效应和动力学效应都会导致层流火焰速度在2,4,4-三甲基-1-戊烯和异辛烷之间产生差异。此外,IC4 H 8在2,4,4-三甲基-1-戊烯和异辛烷的层流火焰速度中起主要作用。

更新日期:2018-06-21
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