HFP가 첨가된 수소/공기 혼합기의 자연점화에서의 화학반응

Chemical Reaction of $H_2$/Air Mixture Inhibited by Heptafluoropropane(HFP) during Autoignition Process

Autoignition suppression of hydrogen/air premixed mixtures by $CF_3CHFCF_3$(HFP) was investigated computationally. Numerical simulation was performed in isobaric and homogeneous system to evaluate the induction times. The detailed chemistry of 93 species and 817 reaction mechanism was introduced for hydrogen/air/HFP mixtures. The results shows the similar concentrations for the major reactants such as hydrogen and oxygen during autoignition while water vapor produced at the ignition temperature was decomposed later, which leaded to the shoulder on the concentration of H, OH and O radical with time. The fluorine included from HFP was converted mainly to stable HF and the carbon was formed to various species, CF2, CF2O, CO etc. More details of chemical effects of HFP addition will be investigate with sensitivity analysis in the near future.