[1]李栋,陈振乾,王鑫,等.冷表面霜晶演化的微观可视化观测[J].东南大学学报(自然科学版),2017,47(1):79-84.[doi:10.3969/j.issn.1001-0505.2017.01.015]
 Li Dong,Chen Zhenqian,Wang Xin,et al.Visualization observation of frost crystal evolution on cold surface[J].Journal of Southeast University (Natural Science Edition),2017,47(1):79-84.[doi:10.3969/j.issn.1001-0505.2017.01.015]
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冷表面霜晶演化的微观可视化观测()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
47
期数:
2017年第1期
页码:
79-84
栏目:
能源与动力工程
出版日期:
2017-01-18

文章信息/Info

Title:
Visualization observation of frost crystal evolution on cold surface
作者:
李栋1陈振乾2王鑫1赵孝保1
1南京师范大学江苏省能源系统过程转化与减排技术工程实验室, 南京 210042; 2东南大学能源与环境学院, 南京 210096
Author(s):
Li Dong1 Chen Zhenqian2 Wang Xin1 Zhao Xiaobao1
1Engineering Laboratory of Energy System Process Conversion and Emission Reduction Technology of Jiangsu Province, Nanjing Normal University, Nanjing 210042, China
2School of Energy and Environment, Southeast University, Nanjing 210096, China
关键词:
霜晶演化 微观可视化 相变驱动力 霜晶消融 霜枝倒伏
Keywords:
frost crystal growth microscopic visualization phase transformation driving force frost crystal melting frost branch fracture
分类号:
TK124
DOI:
10.3969/j.issn.1001-0505.2017.01.015
摘要:
对冷表面霜层生长过程进行了微观可视化研究,对结霜生长过程不同时期的霜晶演化特征进行了观测,同时从相变动力学的角度对冷表面霜层初始液滴成核过程进行了理论分析.试验研究发现,冷表面霜层生长阶段不同位置霜晶呈现不均匀生长,局部存在霜枝倒伏以及霜晶消融现象,且随着时间的推移,冷表面不同位置霜晶逐渐趋于均匀.研究结果表明,冷表面温度越低,湿空气中水蒸气过饱和度越大,相变驱动力越大,发生气液相变形成活化液核的可能性越大.霜晶体表面温度以及局部水蒸气分压力的联合效应是发生霜晶消融的根本原因.
Abstract:
Microscopic visualization of frost layer growth process on cold surface was conducted and frost crystal evolution characteristics in different frost growth periods were observed. In addition, the initial droplet nucleation process on the cold surface was analyzed based on the theory of phase transformation kinetics. The experimental results show that the frost crystals at different positions of the cold surface grow unevenly during the frost layer growth stage and frost branch fracture and frost crystal melting phenomena can be locally seen. It is also found that the frost crystal at different positions gradually tends to be uniform with the time evolution. The study results indicate that the phase transformation driving force increases with the increase of the water vapor supersaturation degree of moist air, thus leading to the increase of the possibility of vapour-liquid phase change and the activate liquid core formation on the surface with lower temperatures. The combined effect on the frost crystal surface temperature and the local water vapor partial pressure is an important reason for the frost crystal melting.

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备注/Memo

备注/Memo:
收稿日期: 2016-07-08.
作者简介: 李栋(1985—),男,博士,讲师;陈振乾(联系人),男,博士,教授,博士生导师,zqchen@seu.edu.cn.
基金项目: 江苏省自然科学基金青年基金资助项目(BK20150979)、江苏省高校自然科学研究资助项目(15KJB470009)、南京师范大学高层次人才科研启动基金资助项目(2015112XGQ0102).
引用本文: 李栋,陈振乾,王鑫,等.冷表面霜晶演化的微观可视化观测[J].东南大学学报(自然科学版),2017,47(1):79-84. DOI:10.3969/j.issn.1001-0505.2017.01.015.
更新日期/Last Update: 2017-01-20