翅片表面融霜滞留液滴的蒸发特性  

Evaporation Characteristics of Defrosting Retention Droplet on Fin Surface

作　　者：汪峰[1,2] 戴飞 杨卫波 Wang Feng;Dai Fei;Yang Weibo(School of Energy and Environment,Southeast University,Nanjing,210096,China;College of Electrical,Energy and Power Engineering,Yangzhou University,Yangzhou,225127,China)

机构地区：[1]东南大学能源与环境学院,南京210096 [2]扬州大学电气与能源动力工程学院,扬州225127

出　　处：《制冷学报》2024年第6期152-157,共6页Journal of Refrigeration

基　　金：国家自然科学基金(52006186);中国博士后科学基金(2020M681453)资助项目;江苏省博士后科研资助计划项目(2020Z303)资助。

摘　　要：为揭示翅片表面融霜滞留液滴的蒸发特性,通过可视化实验研究了液滴尺寸、基底润湿性和倾斜角度、加热温度等因素影响下翅片表面融霜滞留液滴的蒸发过程。实验结果表明:普通铝翅片表面的液滴蒸发模式为恒定接触直径和混合模式,钉扎现象明显,而疏水翅片表面为恒定接触角和混合模式,无钉扎现象,且蒸发耗时更长;液滴在普通翅片表面的蒸发耗时随翅片倾斜角度的增大而减少,倾斜角度越大,液滴蒸发时的脱钉现象越早发生;液滴初始体积相同的情况下,随着加热温度从30℃升至40℃,液滴的蒸发耗时缩短60%。此外,液滴初始体积越大,其蒸发耗时越长,但蒸发模式不变。To reveal the evaporation characteristics of a defrosting retention droplet on a fin surface,the effects of droplet size,fin surface wettability,fin tilt angle,and heating temperature on the droplet evaporation process were studied by a visualization experiment.The experimental results show that the droplet evaporation modes on the bare fin surface are constant contact diameter and mixing modes,and that the pining phenomenon is obvious.Constant contact angle and mixing modes are observed on the hydrophobic fin surface,and there is no spiking phenomenon.Compared to the bare fin,the evaporation time of a droplet on the hydrophobic fin surface is longer.The evaporation time on the bare surface decreases with the increase in the tilt angle.A larger tilt angle leads to an earlier denailing phenomenon.When the initial volume of the droplet is the same,with the increase in heating temperature from 30℃to 40℃,the evaporation time decreases by 60%.In addition,a larger initial volume of the droplet leads to a longer evaporation time,but the evaporation mode remains unchanged.

关 键 词：空气源热泵 翅片 融霜滞留液滴 蒸发 钉扎现象 

分 类 号：TB611[一般工业技术—制冷工程] TB657.5[动力工程及工程热物理—工程热物理] TK124[动力工程及工程热物理—热能工程]