An Experimental Study on the Flame Characteristics of the Air/$C_3$$H_8$ Premixed Flame Using Large Axial Mean Velocity Variation

摘要: Many previous researches on the premixed flame in a tube have treated unsteady behaviors which shape, position and intensity of varied, but more detail fundamental research has been necessary. The stabilization condition tube, unique steady state, behaviors, using as an initial condition, were carried out recent years. In this paper, propane-air was stabilized behavior observed when mean velocity variation imposed into opposite direction velocity. is larger than burning longer reaction time scale. During period not extinguished. But after could be re-stabilized or extinguished depending experimental conditions: equivalence ratio, magnitude variation. extinction mechanisms classified two cases, one caused by stretch shear layer near wall, other vortices vortexes, are generted acoustic waves.