乳化燃料液滴燃焼時における含水率の変化

概要

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An experimental study has been carried out of the combustion behavior of an emulsified fuel droplet in a quiescent gaseous environment. Attention was mainly paid to time histories of water contents in the droplet and microexplosion. The fuel in water emulsions consisting base fuel and water doped with small amount of surfactant were tested after degasification. An emulsified fuel droplet suspended at the tip of a quartz filament was ignited and the droplet flame was quenched by a jet of gaseous nitrogen at an arbitrary instant of time after ignition. Several droplets were sampled in a micropipette, being heated to cause the separation of water and oil layers. Thus, the time histories of the volume of fuel and water in the emulsion droplet were determined for the base fuels of n-dodecane and n-hexadecane. The results showed that the water volume in the droplet was almost constant during the combustion while the fuel volume decreased remarkably with the lapse of time. The effects of the time histories of water content on the onset rate of microexplosion were also revealed.
一般社団法人日本機械学会の論文
1998-02-25