Effects of ethylene addition on counterflow ignition and flame propagation in methane/ethylene mixtures

W. Liu, Y. Huang, T. F. Lu, D. L. Zhu, C. K. Law

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The ignition temperatures of nitrogen-diluted mixtures of methane and ethylene were measured by conterflowing heated air up to 3atms. In addition, the laminar flame speeds of air, methane and ethylene mixtures were obtained in the conterflow system under atmospheric pressure, for extensive ranges of lean-to-rich equivalence ratio. These experimental data, relevant to low-temperature ignition chemistry and high-temperature flame chemistry, were subsequently compared with calculations using two detailed ethylene mechanisms consisting of 70 and 75 species respectively. Sensitivity and Computational Singular Perturbation (CSP) analyses were applied to identify the role of ethylene addition in facilitating nonpremixed ignition and promoting premixed flame propagation. Furthermore, by studying the ignition response and flame propagation of these mixtures of hydrocarbons of the same family but with quite different reactivities, the hierarchical nature of the associated oxidation kinetics was assessed. This issue was further examined by comparing the sizes of the reduced mechanisms of the pure fuels and their mixtures.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Eastern States Section of the Combustion Institute 2007 "Chemical and Physical Processes in Combustion"
PublisherCombustion Institute
Pages290-295
Number of pages6
ISBN (Electronic)9781604239454
StatePublished - 2007
EventFall Technical Meeting of the Eastern States Section of the Combustion Institute 2007: Chemical and Physical Processes in Combustion - Charlottesville, United States
Duration: Oct 21 2007Oct 24 2007

Publication series

NameFall Technical Meeting of the Eastern States Section of the Combustion Institute 2007 "Chemical and Physical Processes in Combustion"

Other

OtherFall Technical Meeting of the Eastern States Section of the Combustion Institute 2007: Chemical and Physical Processes in Combustion
CountryUnited States
CityCharlottesville
Period10/21/0710/24/07

All Science Journal Classification (ASJC) codes

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

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