Abstract

Evaporation of droplets of water–ethanol solutions with different concentrations has been experimentally studied at different relative humidities of ambient air. High-speed micrography has been employed to monitor the dynamics of variations in the sizes of the evaporating droplets. It has been found that relative humidity of the ambient air significantly affects variations in the diameters of water–ethanol solution droplets. Infrared thermography has been used to study variations in the temperature of the evaporating droplets. It has been shown that the temperature of the evaporating droplets decreases with an increase in ethanol concentration at all studied relative air humidities. The minimum values of evaporating droplet surface temperature and evaporation time increase with relative air humidity. The performed generalization of the obtained experimental data may be used when calculating the heat and mass transfer of evaporating droplets of water–ethanol solutions.

中文翻译：

---

空气相对湿度对水-乙醇溶液液滴蒸发的影响

摘要

已经在不同的环境空气相对湿度下对不同浓度的水-乙醇溶液液滴的蒸发进行了实验研究。高速显微摄影已被用于监测蒸发液滴尺寸变化的动态。已经发现，环境空气的相对湿度显着影响水-乙醇溶液液滴直径的变化。红外热成像已被用于研究蒸发液滴的温度变化。已经表明，在所有研究的相对空气湿度下，蒸发液滴的温度随着乙醇浓度的增加而降低。蒸发液滴表面温度和蒸发时间的最小值随着空气相对湿度的增加而增加。