45°倒角表面结霜特性的实验研究

Experimental Research on Frosting Properties of 45° Chamfered Surface

对45°倒角表面在低温高湿条件下结霜过程进行实验研究,分析空气温度和相对湿度对水珠冻结和霜层生长的影响.结果表明:在空气和冷表面温度一定的条件下,随空气相对湿度的增大,过冷水珠冻结时间先延长后缩短,倒角表面的霜层生长速度出现先变快后变慢再变快的趋势;在空气相对湿度和冷表面温度不变的条件下,随空气温度升高,过冷水珠冻结时间先缩短后延长,而倒角表面的霜层生长速度出现先变快后变慢的趋势.

The frosting process of 45° chamfered surface under low temperature and high humidity was studied experimentally.The effects of air temperature and relative humidity on water droplets freezing and frost layer growth were analyzed.The results show that under certain air and cold surface temperatures,the freezing time of supercooled water droplets increases at first and then decreases with the increasing of air relative humidity,while the growth rate of frost layer on the chamfered surface increases at first,then slows down and increases followed.Under the condition of certain air relative humidity and cold surfaces temperature,the freezing time of supercooled water droplets decreases at first and then increases with the increasing of air temperature while the growth rate of frost layer on the chamfered surface increases first and then slows down.