Fuel similarity for laminar flames of C5 to C8 n-alkanes

Peng Zhao, Wenkai Liang, Fujia Wu, Chung King Law

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

Abstract

Previous experiments have demonstrated the fuel similarity for C5 to C8 n-alkanes, i.e., the laminar flame speeds and Markstein lengths of these fuels are very close to each other at various pressures. The possible explanation is that large hydrocarbon fuels always rapidly decompose into smaller fuel fragments, whose subsequent oxidation and transport would control the bulk of the flame structure and propagation rate. Such an understanding would significantly simplify/generalize the description of the combustion of large hydrocarbon fuels with similar molecular structures. The present work computationally investigated the fuel similarity for C5 to C8 n-alkanes systematically in various flame configurations, namely the 1D planar premixed flames, 1D stretched premixed flames, 1D diffusion flames, and 1D unsteady stretched premixed flames. The thermal and chemical structures of these flames, effects of pressure and stretch as well as the large fuel cracking time scale are studied to quantify the criterion for fuel similarity. In addition, for the case of ignition and extinction in nonpremixed systems such as the counterflow and the stagnation flow, for which the ignition/extinction responses seem to be fuel dependent, computation shows that the cause is due to the difference in the diffusive transport such that kinetic similarity is retrieved when the diffusive influence is removed.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
PublisherCombustion Institute
Pages118-123
Number of pages6
ISBN (Electronic)9781629937199
StatePublished - Jan 1 2013
EventFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 - Clemson, United States
Duration: Oct 13 2013Oct 16 2013

Publication series

NameFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013

Other

OtherFall Technical Meeting of the Eastern States Section of the Combustion Institute 2013
CountryUnited States
CityClemson
Period10/13/1310/16/13

All Science Journal Classification (ASJC) codes

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

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    Zhao, P., Liang, W., Wu, F., & Law, C. K. (2013). Fuel similarity for laminar flames of C5 to C8 n-alkanes. In Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013 (pp. 118-123). (Fall Technical Meeting of the Eastern States Section of the Combustion Institute 2013). Combustion Institute.