Receding edge flames stabilized in a counterflow burner

W. F. Carnell, N. T. Kattamis, M. W. Renfro

Research output: Contribution to conferencePaperpeer-review


A method for producing stable negatively propagating (extinction) edge flames was presented using a counterflow burner. A low flow rate CH4/N2 mixture against air was issued through a central 2-cm dia nozzle, creating a stable counterflow diffusion flame. Since the flame produced at the center of the burner continued to burn stably and products flowed outward, burned products were observed to flow through the flame edge. Off-axis extinction in the counterflow burner allowed for creation of a stable extinction wave with the negative propagation velocity matched by incoming burned products. With this burner, detailed diagnostics measurements and simulations of extinction and flame hole evolution could be conducted. Initial [OH] fluorescence measurements showed that the high temperature region of the flame is rapidly diluted by incoming fuel and air immediately following extinction. This dilution was also observed in two-dimensional numerical simulations of the flame edge. These simulations were used to estimate strain rates in the vicinity of the flame edge. This is an abstract of a paper presented at the 30th International Symposium on combustion (Chicago, IL 7/25-30/2004).

Original languageEnglish
Number of pages1
StatePublished - 2004
Event30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations - Chicago, IL, United States
Duration: Jul 25 2004Jul 30 2004


Conference30th International Symposium on Combustion, Abstracts of Works-in-Progress Poster Presentations
Country/TerritoryUnited States
CityChicago, IL

ASJC Scopus subject areas

  • Engineering (all)


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