流体机械

2020, v.48;No.573(03) 73-78

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不同冷表面二次结霜/融霜微观可视化试验研究
Experimental Study of Microscopic Visualization of Secondary Frosting/Defrosting on Different Cold Surfaces

鲁祥友;潘雨阳;景艳阳;谢远来;张进新;
Lu Xiangyou;Pan Yuyang;Jing Yanyang;Xie Yuanlai;Zhang Jinxin;School of Environment and Energy Engineering,Anhui Jianzhu University;Institute of Plasma Physics,Chinese Academy of Sciences;

摘要(Abstract):

对裸铝表面、粗糙表面和腐蚀表面结霜/融霜过程进行了试验研究,对不同时期霜晶生长过程进行了观测。结果表明:在一次结霜过程中,裸铝表面的霜晶生长高度明显高于腐蚀表面和粗糙表面。在二次结霜过程中,裸铝表面由于融霜液滴的局部聚集,导致霜晶高度明显增加;腐蚀表面由于具有亲水性质表现出较好的抑霜性能;粗糙表面上霜晶颗粒细小,沿平面方向分布均匀,在表面形成了一次质密且较为坚硬的"冰面"。2次融霜过程中,腐蚀表面的平均融霜时间比粗糙表面减少了38.2%,可见具有亲水性质的腐蚀表面具有较好的抑霜性能。
The frosting/defrosting process of bare aluminum surface,rough surface and corroded surface was studied.The results show that the frost crystal growth height on bare aluminum surface was obviously higher than that on corroded surface and rough surface.In the process of secondary frost formation,the frost crystal height increased significantly due to the local aggregation of defrosting droplets on the surface of bare aluminum.Due to the influence of corrosion pits,the distribution of frost crystals was random.The frost crystal particles on the rough surface were small and evenly distributed along the plane direction,forming a dense and relatively hard"ice"on the surface.In the two defrosting processes,the average defrosting time of bare aluminum surface and corroded surface was decreased by 38.0% and 38.2% respectively compared to rough surface,indicating that corroded surface with hydrophilic nature had better anti-frosting effect.

关键词(KeyWords): 可视化;凝结;传热;腐蚀;亲水性;霜晶
visualization;condensation;heat transfer;corrosion;hydrophilic;frost crystal

Abstract:

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基金项目(Foundation): 国家自然科学基金项目(51606002);; 安徽省高校省级自然科学研究项目(KJ2019A0755);; 安徽建筑大学自然科学研究项目(JY16-3-184)

作者(Author): 鲁祥友;潘雨阳;景艳阳;谢远来;张进新;
Lu Xiangyou;Pan Yuyang;Jing Yanyang;Xie Yuanlai;Zhang Jinxin;School of Environment and Energy Engineering,Anhui Jianzhu University;Institute of Plasma Physics,Chinese Academy of Sciences;

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