Abstract
The blow-off of diffusion burner flames is affected by the shape of the burner tube, the flow pattern of mixture and surrounding secoundary air, and the state of concentration. There are three kinds of states of the blow-off of a diffusion flame. One is the state in which the mixture is in laminar flow. The other two states are those of turbulent flow. In the turbulent region of the mixture, a vortex of flame is created just outside of the burner tube. At a relatively low velocity of mixture flow in this region, the vortex of flame is blown away by the increasing of the surrounding secondary air velocity, and at a higher velocity of the mixture flow, the blow-off of the flame is accomplished by the blow-off of the propagation from the vortex of flame, as the velocity of secondary air increases.
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