摘要
对水平铜冷面上的结霜过程进行了显微实验观察 ,实验结果表明 :结霜过程基本上都经历了水珠生成、长大、冻结、初始霜晶生成、长大以及霜层成长等过程。根据霜晶的外观形状特点将初始霜晶分成了四大类 ,讨论了初始霜晶形状随冷面温度和空气相对湿度的变化规律 ,指出冷面温度是影响霜晶形状的主要因素 。
The mechanism of frost formation on cold surfaces has brought to researchers' substantial attention Fost formations on a horizontal flat copper surface were experimentally investigated using the microscopic technology It was found that the frost formation on the copper surfaces generally tracks a course as follows: formation and growth of water drops,freezing of the drops,formation and growth of initial frost crystals on the frozen drops and growth of frost layer The initial frost crystals were classified into four groups according to their appearances and shapes The variation of crystal shape with copper surface temperature and air relative humidity was discussed It is pointed out that the copper surface temperature is a primary factor affecting the frost crystal shape,while the air relative humidity has some effect on the frost crystal shape too
出处
《低温工程》
CAS
CSCD
北大核心
2003年第6期41-46,共6页
Cryogenics
基金
国家教育部留学回国人员科研启动基金资助项目
关键词
结霜现象
冷表面
湿空气系统
传感器
生长规律
frost formation
frost crystal shape
freezing transition time of super cooled water drop
freezing diameter
