J141 高温壁面に衝突した単一水滴から生じた水蒸気による拡散火炎の消火(一般講演(4))

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  • J141 Extinguishment of Diffusion Flame with Water Vapor Produced by Single Droplet Impact on Heated Wall

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Blowout experiments of methane-air diffusion flame by using a water vapor vortex ring have been performed. The water vapor vortex ring was produced by a single droplet impact onto a heated flat plate. The blowout probability was measured. The process of water droplet impact on the heated wall was observed by using a high speed camera. The boiling behavior and condition to generate the vortex ring were clarified. It was found that the wall temperature at 250℃ was the most effective condition for the flame extinguishment.

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