Numerical study of soot formation in laminar coflow methane/air diffusion flames doped by n-heptane/toluene and iso-octane/toluene blends

Download
  1. Get@NRC: Numerical study of soot formation in laminar coflow methane/air diffusion flames doped by n-heptane/toluene and iso-octane/toluene blends (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.combustflame.2017.03.002
AuthorSearch for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleCombustion and Flame
ISSN0010-2180
Volume180
Pages167174
Subjectlaminar coflow diffusion flame; gasoline surrogate; toluene reference fuels; PAH-based soot model; synergistic effects
AbstractThe laminar coflow nitrogen-diluted methane/air diffusion flames doped with a small amount of n-heptane/toluene and iso-octane/toluene binary mixtures, investigated experimentally by Kashif et al. (2015), were simulated numerically by using a detailed reaction mechanism and a sectional polycyclic aromatic hydrocarbon (PAH)-based soot model. The numerical model provides results in reasonable qualitative agreement with the experimental data by using the same chemical mechanism, the same soot model, and the same set of constants employed successfully in a previous study to model the effects of n-heptane/iso-octane doping, demonstrating that this overall model is promising to model soot formation in gasoline flames. Soot production is enhanced monotonically with increasing the toluene content in either the n-heptane/toluene or iso-octane/toluene doping fuel mixture. The increase in benzene and pyrene production displays a non-monotonic and synergistic response to the increase in toluene content. These numerical results are consistent with available experimental results as far as the trends in the effects of increasing the toluene content are concerned. Model results show that the dominant pathways responsible for the synergistic effects on benzene and pyrene production are respectively C6H5CH3 (toluene) + H ↔ A1 (benzene) + CH3 and A3- (C14H9) + C2H2 ↔ A4 (pyrene) + H.
Publication date
PublisherElsevier
LanguageEnglish
AffiliationMeasurement Science and Standards; National Research Council Canada
Peer reviewedYes
NPARC number23001810
Export citationExport as RIS
Report a correctionReport a correction
Record identifier8d9fe79a-7824-48d9-9a95-77e5a5b9f6ff
Record created2017-04-10
Record modified2017-04-10
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)