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Burning Rate of Premixed Methane-Air Flames Inhibited by Fluorinated Hydrocarbons.


pdf icon Burning Rate of Premixed Methane-Air Flames Inhibited by Fluorinated Hydrocarbons. (634 K)
Linteris, G. T.; Truett, L.

Halon Options Technical Working Conference. Proceedings. HOTWC 1994. May 3-5, 1994, Albuquerque, NM, 217-228 pp, 1994.

Keywords:

halons; hydrocarbons; burning rate; premixed flames; methane; air; oxidation; halon alternatives

Abstract:

This paper presents the first measurements of the burning rate of premixed flames inhibited by three fluorinated hydrocarbons that have oxidation chemistry which is similar to agents which may be used as replacements for CF3Br. The burning rate of premixed methane-air flames stabilized on a Mache-Hebra nozzle burner was determined using the total area method from schlieren images of the flame. The inhibitors were tested over a range of concentrations and fuel-air equivalence ratios. The measured burning rate reductions are compared with those predicted by numerical solution of the species and energy conservation equations employing a detailed chemical kinetic mechanism recently developed at the National Institute of Standards and Technology (NIST). This paper presents initial efforts at testing and validation of the mechanism using burning rate data. The mode of inhibition of these chemicals is inferred through interpretation of the numerical results.