An experimental and modeling study on sooting characteristics of laminar counterflow diffusion flames with partial premixing

The effects of partial premixing on soot formation were investigated both experimentally and numerically in counterflow diffusion flames (CDFs) ethylene, propane ethylene/propane binary mixtures. ratio was maintained at relatively low levels so as to minimize the hydrodynamic effects; while chemical can be highlighted. experimental results simulations consistently showed that notably increased ethylene flames; it slightly reduced flames, suggesting played different roles process flames. Kinetic analyses revealed opposing propargyl this turn led benzene polycyclic aromatic hydrocarbons (PAH), finally inception process. For propane/ethylene mixtures, observed synergistic with added CDFs disappeared, indicating a cross-linking effect between mixture. In addition, present model satisfactory performance reproducing mismatch PAH tendencies CDFs. This result implies great care is needed when using concentration an indicator sooting tendency fuels. modeling provided new insights into role evolution their blends. Further investigations towards larger liquid such diesel surrogates are required.