低温环境下水平铜表面液滴冻结的实验研究  

EXPERIMENTAL STUDY OF DROPLET FROZEN ON HORIZONTAL COPPER SURFACE UNDER LOW AMBIENT TEMPERATURE

作　　者：黄玲艳[1] 刘中良[1] 刘耀民[1] 勾昱君[1] 

机构地区：[1]北京工业大学传热强化与过程节能教育部重点实验室,北京100124

出　　处：《工程热物理学报》2010年第4期647-650,共4页Journal of Engineering Thermophysics

基　　金：北京市科技计划项目(No.Z07020600290793)

摘　　要：本文实验研究了低温受迫对流条件下空气参数对水平冷表面上液滴冻结的影响。冷表面温度分别为-15.5℃和-19.5℃,空气温度变化范围为-6～8.5℃,相对湿度变化范围为50%～80%,空气流速变化范围为1.0～9.0 m/s。结果表明,冷表面上液滴冻结的时间随冷面温度的升高而增加,随空气相对湿度的升高而减小。另外,空气温度和流速对冷表面液滴冻结也有较大的影响,随着空气温度和流速的增加,液滴冻结时间先减小后增大。The effects of environmental parameters on water droplet frozen on horizontal copper surface under low ambient temperature and forced convection were investigated experimentally.The cold surface temperature is -15.5℃and -19.5℃,the ambient air temperature is varied in the range of -6℃to 8.5℃,the relative humidity is varied in the range of 50%to 80%,and the air velocity is varied from 1.0 m/s to 9.0 m/s.The experimental results show the water droplets frozen time increases with the increasing cold surface temperature and decreases with the increasing air humidity. In addition,the air temperature and velocity have obvious effects on the droplets frozen;the water droplets frozen time firstly decreases and then increases with the increasing air temperature and velocity.

关 键 词：结霜 液滴冻结 临界半径 

分 类 号：TK124[动力工程及工程热物理—工程热物理]