Effects of hydrogen addition on the structure of n-dodecane laminar, co-flow flame

A. Makwana, M. Linevsky, S. Iyer, R. Santoro, T. Litzinger, J. O'Connor

Research output: Contribution to conferencePaper

Abstract

The goal of this work is to understand the effects of hydrogen addition on n-dodecane flame structure in an axisymmetric, co-flow, laminar flame at atmospheric pressure. Hydrogen is added to the n-dodecane flame to increase the fuel H/C ratio from 2.16 to 4.0. The flames investigated are non-premixed and the total carbon flow rate is kept constant to facilitate comparison amongst the flames. Additionally, to isolate the chemical and dilution effects of hydrogen addition on flame structure and soot volume fraction, flames diluted with helium are also studied. Laser-induced incandescence and laser extinction are applied to obtain two-dimensional soot volume fraction. The experimental results indicate that visible flame length increases by 25% with the addition of hydrogen. However, the increase in visible flame length is marginal when the same volume fraction of helium is added. Additionally, the peak soot volume fraction of the n-dodecane flame doesn't change significantly with addition of either hydrogen or helium. In hydrogen diluted flames, the location where LII is first detected shifts to higher heights above the burner as compared to helium diluted flames.

Original languageEnglish (US)
StatePublished - Jan 1 2018
Event2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018 - State College, United States
Duration: Mar 4 2018Mar 7 2018

Other

Other2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018
CountryUnited States
CityState College
Period3/4/183/7/18

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All Science Journal Classification (ASJC) codes

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

Cite this

Makwana, A., Linevsky, M., Iyer, S., Santoro, R., Litzinger, T., & O'Connor, J. (2018). Effects of hydrogen addition on the structure of n-dodecane laminar, co-flow flame. Paper presented at 2018 Spring Technical Meeting of the Eastern States Section of the Combustion Institute, ESSCI 2018, State College, United States.