Effect of Halogenated Flame Inhibitors on C1-C2 Organic Flames.
Effect of Halogenated Flame Inhibitors on C1-C2 Organic
Noto, T.; Babushok, V. I.; Burgess, D. R. F., Jr.;
Hamins, A.; Tsang, W.; Miziolek, A. W.
Combustion Institute, Symposium (International) on
Combustion, 26th. Proceedings. Volume 1. July
28-August 2, 1996, Napoli, Italy, Combustion Institute,
Pittsburgh, PA, 1377-1383 pp, 1996.
combustion; flame extinguishment; flame propagation;
kinetics; simulation; validation; burning velocity;
The influence of CF3Br, CF3I, CF4, CHF3, C2F6, and C2HF
on laminar flame propagation in mixtures of CH4, CH3OH,
C2H6, and C2H4 with air has been determined by numerical
simulaitons. Comparisons are made with experimental
results and earlier calculations. Flame velocities as a
function of inhibitor concentration and equivalence
ratio have been determined. For all the organic fuels,
the ranking of inhibitive efficience is CF3Br,
CF3I>C2F6>C3HF5>CHF3>CF4. The bromine and iodine
compounds are clearly the ost efficient flame
suppressants. They are of equal effectiveness except in
methanol, where CF3I is superior. The retardants are
more effective for rich mixtures than for lean. With 1%
inhibitor concentration, the decrease in burning
velocity is most pronounced for unsaturated fuels. The
general ordering is consistent with calculational
results on flame thickness and radical concentrations.
Reaction pathway analysis demonstrates the importance of
the regeneration of reactive scavengers. Relative
contributions from physical and chemical effects are