Abstract
In this study measuring the deviation of the opposed-jet diffusion flame or the distance between the flame and the impingement plane, it is found that the deviation varies discontinuously at a certain jet velocity. The analytical results on the relation between the deviation and the jet velocity, which are obtained from thin flame kinetics following the usual concept that the ratio of O 2 mass flux to fuel mass flux into the flame front is stoichiomatric, are qualitatively consistent with the measured values at lower jet velocities than the velocity of discontinuity. From these results it is possible to say that the stability of diffusion flames stretched violently at higher jet velocities follows a different concept from usual.
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