519 噴流拡散火炎における浮き上がり・吹き飛びと火炎挙動に関する研究

概要

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The flame stability limits essentially define the fundamental operation of the combustion system. The critical conditions at the stability limits are highly dependent on flow configurations and some species of fuels. For various species of fuels (methane and propane), the flame-base stability mechanism for flame holding has been studied. In this study, the transition behavior from the stable flame attached to nozzle rim to lifting and blow-off is observed experimentally in unconfined, quiescent atmosphere. The lifting and blow-off criteria are proposed for the diffusion flame. Experiments were conducted to investigate the flame structure for various nozzle diameters from 0.14 to 8.1mm. The results obtained are as follows. The behaviors of the flames are classified into three regions for the methane hydrogen and four regions for the propane.
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