抄録
PAH production of counterflow diffusion flame has been investigated experimentally. In particular, effect of variation of flame characteristics such as flow stretch, stoichiometric mixture fraction, and molar stoichiometry, on PAH production is discussed in the present study. PAH production is strongly correlated with the flow stretch. For larger flow stretch condition, PAH production is clearly enhanced. Effect of stoichiometric mixture fraction variation is also clarified. To increase the stoichiometric mixture fraction reduces PAH formation. A simple numerical analysis for counterflow diffusion flame with GRI-Mech shows that those results are reasonably explained based on the laminar flamelet concept. Concerning the formation mechanism of measured PAH, reaction path of benzene and PAH via propargyl has a key roll in the present experimental condition.
