On the basis of the detailed chemical kinetic mechanism of methanol oxidation
the simplified chemical kinetic mechanism of methanol including 18 species and 28-step elementary reaction was presented to describe premixed laminar flame speed with sensitivity analysis. It is found that the methanol oxidation exhibits strong sensitivity to the kinetics of methanol decomposition and the chain reaction of radicals such as H and OH
in which HCO+M and H+O
2
are the main reactions to generate H and OH radicals
respectively. The comparison between the calculated results and experimental data shows that the present simplified mechanism could simulate laminar flame speed and flame structure reasonably in the range of equivalence ratios from 0.6 to 1.2 and at different initial temperatures. Compared with the detailed mechanism
the simplified mechanism is more suitable to coupling with three-dimensional CFD models.
关键词
Keywords
references
蒋德明. 内燃机燃烧与排放学[M]. 西安:西安交通大学出版社, 2001.
NORTON T S, DRYER F L. Some new observations on methanol oxidation chemistry [J]. Combustion Science and Technology, 1989, 63(1):107-129.
EGOLFOPOULOS F N, DU D X, LAW C K. A comprehensive study of methanol kinetics in freely-propagating and burner:stabilized flames, flow and static reactors, and shock tubes [J]. Combustion Science and Technology, 1992, 83(1):33-75.
LI J, ZHAO Z W, KAZAKOV A, et al. A comprehensive kinetic mechanism for CO, CH2O, and CH3OH combustion[J]. International Journal of Chemical Kinetics, 2007, 39(3):109-136. [5] HELD T J, DRYER F L. A comprehensive mechanism for methanol oxidation [J]. International Journal of Chemical Kinetics, 1998, 30(11):805-830.