Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes

Dong Han, Sili Deng, Wenkai Liang, Peng Zhao, Fujia Wu, Zhen Huang, Chung King Law

Research output: Contribution to conferencePaper

Abstract

The laminar flame speeds and nonpremixed ignition temperatures of toluene and the xylene isomers were experimentally determined at atmospheric and elevated pressures. The experimental situations were then simulated using the kinetic models of Metcalfe et al. (M-mechanism) and Narayanaswamy et al. (N-mechanism). The experimental results show that the toluene flame propagates faster than the xylene flames at all pressures, while the computation analyses show that this is primarily due to the fuel chemistry. For the nonpremixed stagnation ignition, experimental results show that toluene has lower ignition temperatures than the xylenes, and numerical analysis identifies that it is mainly due to the higher fuel diffusivity of toluene. Furthermore, the ignition temperatures of o-xylene are lower than those of m- and p-xylenes, and are suggested to be due to the formation of dimethylphenyl radicals with isolated H abstraction sites, which react with O2 for further chain branching. The computed ignition temperatures for all fuels are consistently higher than the experimental values.

Original languageEnglish (US)
StatePublished - 2016
Event2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016 - Princeton, United States
Duration: Mar 13 2016Mar 16 2016

Other

Other2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016
CountryUnited States
CityPrinceton
Period3/13/163/16/16

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)

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