| 摘要: |
| 为揭示冷表面温度对超疏水翅片结霜特性与抑霜性能的影响规律，本文搭建了可视化结霜实验系统，并对不同冷表面温度下超疏水翅片的结霜过程进行研究，同时与未经表面处理的裸翅片进行对比。实验结果表明：超疏水翅片表面初始凝结液滴开始冻结、冻结50%和完全冻结的时间均随冷表面温度的降低而缩短；冷表面温度越低，晶核的临界半径越小，晶核越密集，液滴完全冻结时表面覆盖率越高；超疏水和裸翅片表面的霜层厚度随着冷表面温度的降低而增加，结霜45 min后，超疏水翅片在冷表面温度为-5、-10、-15、-20 ℃时的霜层厚度分别为裸翅片的78.8%、95.6%、94.6%和78.8%，表明超疏水翅片在不同冷表面温度下均具有抑霜效果。 |
| 关键词: 结霜 超疏水翅片 冷表面温度 凝结液滴 |
| DOI： |
| Received:February 28, 2022Revised:April 27, 2022 |
| 基金项目:国家自然科学基金项目（No.52006186），中国博士后科学基金面上项目（No.2020M681453），江苏省高等学校自然科学研究面上项目（No.19KJB470037）资助。 |
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| Effects of Cold Surface Temperature on Frosting Characteristics and Anti-Frosting Performance of Superhydrophobic Fins |
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Wang Feng1, Tang Rui1, Wang Zhihao1, Yang Weibo1, Gao Ang2
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| (1.College of Electrical, Energy and Power Engineering, Yangzhou University;2.Guangdong Euroklimat Air-conditioning & Refrigeration Co., Ltd,) |
| Abstract: |
| To determine the influence of cold surface temperatures on the frosting characteristics and anti-frosting performance of superhydrophobic fins, the frosting process on superhydrophobic fins under different cold surface temperatures was studied. A visual frosting experimental system was built and the results were compared with those of bare fins without surface treatment. As the cold surface temperature decreased, the onset freezing time of condensate droplets, half freezing time, and complete freezing time on the superhydrophobic fin surface were shortened. The lower the cold surface temperature, the smaller the critical radius of the crystal nucleus, the denser the crystal nucleus, and the higher the surface coverage when the droplets were completely frozen. The frost thickness of the superhydrophobic and bare fins increased as the cold surface temperature decreased. After frosting for 45 min, the frost thickness on the superhydrophobic fins at cold surface temperatures of ?5, ?10, ?15, and ?20 °C were 78.8%, 95.6%, 94.6%, and 78.8% of those on bare fins, respectively. This indicates that superhydrophobic fins have an anti-frosting effect at different cold surface temperatures. |
| Key words: frosting superhydrophobic fin cold surface temperature condensate droplet |
