水蒸気を含む高温気流中に懸垂した液滴の蒸発速度 : 第2報, 炭化水素液滴の場合

概要

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The influence of environmental water vapor on the evaporation rate constant was reported for a single suspended droplet of water or water-soluble liquid in the previous report. The present report concerns the evaporation rate of paraffin hydrocarbon droplets, representing fossil oil droplets, which are insoluble in water, suspended in a hot air flow containing water vapor, as in the 1st study. The line which indicate the time history of the square of droplet diameter is composed of two linear lines connected incontinuously. In the first stage, the evaporation of hydrocarbon occurs and in the latter, water introduced into the droplet from the environment evaporates. The evaporation rate constant of a hydrocarbon droplet increases with the addition of water vapor because of condensation of water at the droplet surface. The energy supply from water condensation and the increase of evaporation rate were verified using a simplified model of energy balance based on experimental data.
社団法人日本機械学会の論文
1997-05-25