Asymmetric whirl combustion: A new low NOx approach

Richard A. Yetter, Irvin Glassman, H. Clay Gabler

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70 Scopus citations


A promising new approach for non-premixed low-NOx combustor design is presented in which fuel was injected off-axis or asymmetrically into a whirl flame. Experiments using this technique to react methane and air in an atmospheric laboratory-scale burner demonstrated low NO emissions levels coupled with modest CO emissions. NO emissions below 15 ppm were measured with associated CO below 25 ppm at 15% O2. The combustor was shown to exhibit unusual stability characteristics even at overall equivalence ratios below φ = 0.1. Presented in this paper are the design of the novel whirl combustor, the results of an experimental characterization of the combustor emissions, and a numerical examination of the internal structure of the flame, which provides an explanation of this unusual behavior.

Original languageEnglish (US)
Pages (from-to)1265-1272
Number of pages8
JournalProceedings of the Combustion Institute
Issue number1
StatePublished - 2000
Event30th International Symposium on Combustion - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004

All Science Journal Classification (ASJC) codes

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


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