激光表面改性促进水蒸气滴状冷凝传热的实验研究  

Experimental Investigation of Dropwise Condensation of Steam on Laser Modified Tube Surface

作　　者：李瑞卿[1] 彭如恕[1] 刘清[1] 

机构地区：[1]南华大学机械工程学院,湖南衡阳421001

出　　处：《热加工工艺》2012年第10期133-135,共3页Hot Working Technology

基　　金：湖南省科学技术厅资助项目(2011FJ3186)

摘　　要：采用激光表面处理的方法,优化激光工艺参数,对激光改性表面的冷凝换热特性进行了实验比较研究。发现了激光表面改性换热管促进了滴状冷凝形态特性,提高了凝结换热系数;通过对改性层组织结构的观察与分析,促进了滴状冷凝的机理分析和研究,为激光表面改性强化冷凝换热性能研究提供指导。Dropwise condensation on laser modified tube surface was investigated.The experimental results of heat transfer revealed show that dropwise condensation can be formed on the laser modified tube surface with optimum process parameters.In addition,the mechanism of dropwise condensation facilitated by laser treatment tube surface was analyzed by the observation and analysis of microstructure of the modified layer.All the work provides scientific basis for the further research of laser modified surface coating.

关 键 词：激光改性 滴状冷凝 金相组织 低表面能 

分 类 号：TG174[金属学及工艺—金属表面处理]