抄録
In this study, with an original flow type burner, the response of premixed flame in periodic equivalence ratio fluctuation was examined on the burning velocity and the burned gas temperature of the methane/air flame and propane/air flame (in the equivalence ratio of 0.85, the amplitude of 0.06 and the frequency from 3 Hz to 50 Hz) . This observation reached the following results (1) in a certain range of the fluctuation frequency f, the fluctuation widths of the burning velocity and the burnt gas temperature were larger than those estimated for the equivalence ratio fluctuation in the mixture at the burner exit. (2) The fluctuating width of apparent equivalence ratio A of the mixture flowing into the flame front, which was measured through the relationship between equivalence ratio and burnt gas temperature for the stationary flames, were at the maximum at a certain range of the f, regardless of the kinds of fuel. (3) Within the frequency range in this study, A of methane/air flames was larger than that of propane/air flames.
