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建立了多组分液滴蒸发过程的理论模型,通过该模型计算了不同浓度的酒精液滴在静止环境中的蒸发过程,计算结果与试验结果基本一致。计算和试验结果表明:在蒸发过程中,液滴中酒精的浓度不断下降,受其影响液滴的蒸发速率也不断下降;酒精浓度和环境温度越高,液滴的蒸发速度越快。酒精液滴蒸发过程中,无量纲面积与时间不再是线性关系,这是与单组分液滴蒸发过程的本质区别。
A theoretical model of the multi-component droplet evaporation process was established. Through this model, the evaporation process of ethanol droplets with different concentrations in static environment was calculated. The calculated results are in good agreement with the experimental results. The calculation and experimental results show that during the evaporation process, the concentration of alcohol in the droplet continuously decreases, and the evaporation rate of the droplet decreases. The higher the alcohol concentration and the ambient temperature, the faster the evaporation rate of the droplet. In the process of alcohol droplet evaporation, the dimensionless area is no longer linear with the time, which is the essential difference from the one-component droplet evaporation process.