Detailed characterization of low temperature chemistry and the influence on turbulent burning velocities for n-heptane and iso-octane reactor-assisted turbulent premixed flames

Bret Windom, Sang Hee Won, Bo Jiang, Yiguang Ju

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

Abstract

At conditions experienced in advanced gas turbine engines, typical jet fuels can undergo low temperature ignition during the mixing of the reactants prior to their introduction into the turbulent flame. Thus, to aid in the design and the efficient usage of advanced turbine engines, it is of great importance to understand the role of low temperature chemistry on turbulent flame propagation and flame regimes. A reactor assisted turbulent slot (RATS) burner has been designed and constructed which is capable of subjecting liquid fuels to conditions susceptible to low temperature ignition prior to their introduction into a turbulent flame. The current study is an extension on previous work, which demonstrated the strong dependence of turbulent flame speeds with the extent of low temperature chemistry for n-heptane/air mixtures. Further investigation into this phenomenon has been carried out to determine the role of the observed dependence on the turbulent burning behavior with the low temperature chemistry. Fuel composition at the exit of the reactor following low temperature chemistry of n-heptane/air mixtures have been quantified using gas chromatography. Turbulent flame speeds of methane/air and iso-octane/air mixtures have been measured to provide a comparison to the previously made n-heptane/air measurements. Finally, close examination of the instantaneous flame structure for the chemically frozen and the low temperature ignited n-heptane/air, iso-octane/air, and CH4/air flames reveal differences in the degree of flame wrinkling. The culmination of these results provides a more complete understanding regarding the influence of the altering transport and kinetic properties following low temperature ignition on the turbulent flame propagation and flame regime.

Original languageEnglish (US)
Title of host publicationFall Technical Meeting of the Western States Section of the Combustion Institute, WSS/CI 2013 Fall Meeting
PublisherWestern States Section/Combustion Institute
Pages233-240
Number of pages8
ISBN (Electronic)9781629935843
StatePublished - Jan 1 2013
EventFall Technical Meeting of the Western States Section of the Combustion Institute, WSS/CI 2013 - Fort Collins, United States
Duration: Oct 7 2013Oct 8 2013

Publication series

NameFall Technical Meeting of the Western States Section of the Combustion Institute, WSS/CI 2013 Fall Meeting

Other

OtherFall Technical Meeting of the Western States Section of the Combustion Institute, WSS/CI 2013
CountryUnited States
CityFort Collins
Period10/7/1310/8/13

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Detailed characterization of low temperature chemistry and the influence on turbulent burning velocities for n-heptane and iso-octane reactor-assisted turbulent premixed flames'. Together they form a unique fingerprint.

  • Cite this

    Windom, B., Won, S. H., Jiang, B., & Ju, Y. (2013). Detailed characterization of low temperature chemistry and the influence on turbulent burning velocities for n-heptane and iso-octane reactor-assisted turbulent premixed flames. In Fall Technical Meeting of the Western States Section of the Combustion Institute, WSS/CI 2013 Fall Meeting (pp. 233-240). (Fall Technical Meeting of the Western States Section of the Combustion Institute, WSS/CI 2013 Fall Meeting). Western States Section/Combustion Institute.