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Burning Rate of Premixed Methane-Air Flames Inhibited by Fluorinated Hydrocarbons. [Abstract Only]


pdf icon Burning Rate of Premixed Methane-Air Flames Inhibited by Fluorinated Hydrocarbons. [Abstract Only] (177 K)
Linteris, G. T.; Truett, L.

NISTIR 5499; September 1994.

National Institute of Standards and Technology. Annual Conference on Fire Research: Book of Abstracts. October 17-20, 1994, NISTIR 5499, Gaithersburg, MD, 17-18 pp, 1994 AND Combustion Institute. Symposium (International) on Combustion, 25th. Proceedings. Abstracts of Work-in-Progress Poster Session Presentations. July 31-August 5, 1994, Irvine, CA, Combustion Institute, Pittsburgh, PA, 148 pp, 1994, 1994.

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Keywords:

fire research; hydrocarbons; burning rate; premixed flames; methane

Abstract:

The agents which are currently being considered as replacements for fire suppressant agent CF3Br are mostly fluorinated hydrocarbons and perfluorinated alkanes. This abstract describes measurements of the reduction in burning rate of premixed methane-air flames with the addition of the single carbon inhibitors CF4, CF3H, CF2H2, and CF3I. Early studies of the inhibitory effects of halogenated hydrocarbons on flames were conducted in premixed systems. The premixed laminar burning rate is a fundamental parameter describing the overall reaction rate, heat release, and heat and mass transport in a flame. In addition, the reduction in the premixed flame burning rate is useful for understanding the mechanism of chemical inhibition of fires since diffusion flames often have a stabilization region which is premixed, and good correlation has been found between the reduction in burning rate and the concentration of inhibitors found to extinguish diffusion flames. Premixed flame burners have flow fields which are relatively easily characterized, making interpretation of the inhibitor's effect on the overall reaction rate straightforward.