Inhibition/Promotion Effect of C(6)F(12)O Addition on Premixed Laminar RP-3/Air Flames

[Image: see text] C(6)F(12)O (Novec 1230) is one of the most potential substitutes of Halon 1301. However, the study of inhibition/promotion effect of C(6)F(12)O addition on aviation kerosene is rarely reported, which greatly limits the development and application of C(6)F(12)O in oil fire accidents. In this study, numerical research was conducted to study the inhibition/promotion effect of C(6)F(12)O addition by a newly developed and optimized RP-3/C(6)F(12)O coupling skeletal mechanism. A novel methodology based on fictitious species was proposed and adopted to identify the physical dilution and thermal effects as well as the chemical radical and thermal interaction effects of C(6)F(12)O addition. It is observed that both inhibition and promotion effects can be exhibited because the chemical effect includes radical and thermal interactions at different equivalence ratios. In order to explore the kinetic reasons, the reaction path analyses were conducted. The results indicate that the HF formation reactions and the O(2) consumption fluorine-containing reactions, as well as the reactions of H(2)O + F = OH + HF and C(3)F(7) + O(2) = C(3)F(7)O + O, were the key inhibition and promotion reaction routes, respectively. Compared with methane, the lower H/C ratio of RP-3 makes it more suitable for the use of C(6)F(12)O to suppress combustion.