アルコール混合燃料液滴の燃焼

概要

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This paper reviews about the vaporization and combusiton characteristics of ethanol-blended diesel oil droplets. Ethanol is soluble in diesel oil at a suitable temperature, so this blended fuel keeps uniform and stable. Analyzing by using a high speed camera, the expansion rate of a droplet increases with increasing ethanol content. Since ethanol has a low boiling point and high latent heat of vaporization, the periods of the droplets vaporization and combustion become longer with increasing ethanol content. However, when we compare the combustion period of 10% blended fuel with the one of 20% blended fuel, we found that difference could be ignored. The reason of this result can be explained as follows. As combustion photographs show, the reduction of the combustion period of 20% blended fuel results from the microexplosion. The vaporization rate of ethanol in a deroplet increase with increasing ethanol content, so we found that this condition is favorable for the microexplosion.
公益社団法人日本マリンエンジニアリング学会の論文