高温気流中に懸垂した液滴の蒸発速度に与える気流乱れの影響 : 第1報, 乱れスケールおよび蒸発ダンケラー数による蒸発速度への影響の検討

概要

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The evaporation process of a suspended droplet was examined for several kinds of paraffin hydrocarbon fuel, distilled water and ethanol in a hot turbulent air flow. As the turbulence intensity increases, the evaporation rate constant increases for all materials because the Kolmogorov microscale becomes smaller. When the boundary layer thickness of vapor concentration around a droplet is thin, the droplet evaporation is accelerated as the mass transfer rate of vapor is increased by the flow turbulence due to steep gradient of the concentration. The vaporization Damkehler number is not suitable for estimating the influence of turbulence on evaporation rate under the condition where evaporation occurs intensely.
社団法人日本機械学会の論文
1996-02-25