水蒸气滴状冷凝过程的可视化实验研究  

A VISUALIZING EXPERIMENTAL STUDY ON DROPWISE CONDENSATION PROCESS OF STEAM

作　　者：梁世强[1] 陈坚[1] 方徐应[2] 徐靖中[1] 赵耀华[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100080 [2]北京石油化工学院,北京102617

出　　处：《工程热物理学报》2005年第6期986-988,共3页Journal of Engineering Thermophysics

基　　金：国家重点基础研究发展规划(973)项目(No.G2000026306)

摘　　要：本文通过建立水蒸气滴状冷凝过程的可视化实验装置,采用高速摄像仪对蒸汽在铜基网格状高分子聚合物络合膜表面上发生的滴状冷凝过程进行了观测。我们发现液滴的大小按照等比数列的形式排列,比例系数为1.25。这一发现与Rose关于液滴生长和尺寸分布的假说相吻合,并且从实验事实的中得出了两个重要参数,γ和p,的值分别为1.25 和0.072,这与最新的理论计算值十分接近。A set of visualizing experiment apparatus was established to investigate the dropwise condensation behavior of steam on a brass surface, which is coated by an ultra-thin network-like polymer film, and a high-speed video camera was employed to do this work. It was found that the radii of drops is sized in a form of geometric progression, and the geometric proportion is 1.25. The finding supports Rose＇s assumption about the growth and size distribution of drops. Two important parameters, γ and ρ, were also decided by experimental facts to be 1.25 and 0.072, which agree well with the latest theoretical results.

关 键 词：滴状冷凝 可视化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]