Effects of unsteadiness and fuel Lewis number on Burke-Schumann type jet diffusion flames

Marcos Chaos, Ruey Hung Chen*, Eric J. Welle, William L. Roberts

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


The effects of unsteadiness and fuel Lewis number (LeF) on Burke-Schumann type diffusion flames were studied. Systematic determination of the effect of LeF on flame temperature and NOx was experimentally observed in laminar and turbulent flames. Helium and argon diluted methane, propane, and hydrogen diffusion flames in a Burke-Schumann configuration were studied. Varying the dilution level of these two inert gases allowed for LeF to change over a wide range of values. Vortices generated by a loudspeaker with controlled frequencies and amplitudes were introduced in the fuel stream to systematically determine the combined effect of unsteadiness and LeF) in diffusion flames. Implications of NOx and soot emission will be discussed as a result of dilution and varying Lewis number.

Original languageEnglish (US)
Title of host publicationInternational Symposium on Combustion Abstracts of Works-in-Progress Posters
Number of pages1
StatePublished - 2002
Externally publishedYes
Event29th International Symposium on Combustion - Sapporo, Japan
Duration: Jul 21 2002Jul 26 2002


Other29th International Symposium on Combustion

ASJC Scopus subject areas

  • Engineering(all)

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