抄録
In this study, effect of diluent gas on combustion characteristics of stretched flames of two-component fuel mixtures are investigated by chemical kinetics computations. Lean and rich mixtures having nearly the same laminar burning velocity are prepared by adding diluent gas to fuel and O_2, where the hydrogen additional rate δ are varied from 0 to 1. One of N_2, Ar and CO_2 is selected as a diluent gas. As a result, it is elucidated that Markstein numbers of mixtures diluted with CO_2 are smaller than that of mixtures dilueted with N_2 or Ar. Characteristics of response to flame stretch are discussed in light of the lewis number and chemical reaction mechanisms.
