物理学报2012，Vol.61Issue(15)：96-103,8.
滴状冷凝过程液滴自由表面温度场分析
The analysis of droplet surface temperature field during dropwise condensation process
摘要
Abstract
The invistigations on dropwise condensation process and the mechanism of heat transfer enhancement are usually based on the droplet distribution and the movement principle of droplets on condensing surface.In the meanwhile,a single droplet is treated as a stable individual and the movement property inside the droplet is rarely considered.With infrared thermography,the surface temperature distribution of condensate droplet during steam dropwise condensation process is observed.The result shows that the temperature of droplet surface first decreases and then increases and up to a value higher than the initial one as the droplet migrates from one position to another.The droplet will roll and the surface film would be tracked when the droplet moves on the hydrophobic surface.With the convection inside the droplet,condensate near the wall moves to the surface side.The analysis of surface temperature evolution of droplet indicates that the continuous condensation on droplet surface may occur when the surface subcooling exceeds a critical value.The direct condensation on large droplet surface can be promoted by the dynamic process such as droplet coalescence or falling off,which provides a new approach to the condensation heat transfer enhancement.关键词
红外热像/表面温度/滴状冷凝/临界过冷度Key words
infrared thermography/surface temperature/dropwise condensation/critical subcooling分类
化学化工引用本文复制引用
兰忠,朱霞,彭本利,林勐,马学虎..滴状冷凝过程液滴自由表面温度场分析[J].物理学报,2012,61(15):96-103,8.基金项目
国家自然科学基金（批准号：50906006）资助的课题 （）
