Study on the Stability of Diffusion Flame Anchored at the Impinged Point between an Air Stream and a Combustible Gas Stream : Part 2, Stability Model of the Flame

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In regard to the stability of a diffusion flame in which air and fuel stream impinges at right angles to each other, from the experimental study the following factors could be found very effective to increase stability of the flame : (1) to make mixture ratio near-stoichiometric (2) to make velocity of fuel-air mixture flow small (3) to increase burner port temperature high From these results, to make sure the stability of flame of such a system, a new flame stretch theory was advanced. In the theory, it was assumed that at anchored point of the flame, concentration is stoichiometric. From velocity and concentration profile in the cold model, a stretch factor in the hot system was assumed. Under such assumptions, the results of calculating flame stretch factors were almost constant.
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