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 K. 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.

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
  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry

Cite this

Han, D., Deng, S., Liang, W., Zhao, P., Wu, F., Huang, Z., & Law, C. K. (2016). Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes. Paper presented at 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, Princeton, United States.
Han, Dong ; Deng, Sili ; Liang, Wenkai ; Zhao, Peng ; Wu, Fujia ; Huang, Zhen ; Law, Chung K./ Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes. Paper presented at 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, Princeton, United States.
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Han, D, Deng, S, Liang, W, Zhao, P, Wu, F, Huang, Z & Law, CK 2016, 'Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes' Paper presented at 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, Princeton, United States, 3/13/16 - 3/16/16, .

Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes. / Han, Dong; Deng, Sili; Liang, Wenkai; Zhao, Peng; Wu, Fujia; Huang, Zhen; Law, Chung K.

2016. Paper presented at 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, Princeton, United States.

Research output: Contribution to conferencePaper

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T1 - Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes

AU - Han,Dong

AU - Deng,Sili

AU - Liang,Wenkai

AU - Zhao,Peng

AU - Wu,Fujia

AU - Huang,Zhen

AU - Law,Chung K.

PY - 2016/1/1

Y1 - 2016/1/1

N2 - 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.

AB - 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.

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Han D, Deng S, Liang W, Zhao P, Wu F, Huang Z et al. Laminar premixed flame propagation and non-premixed ignition of toluene and xylenes. 2016. Paper presented at 2016 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2016, Princeton, United States.