| 表面纳米结构及其自由能对滴状冷凝传热的影响 |
| |
| 引用本文： | 马学虎,汪明哲,兰忠,王四芳,李晓楠.表面纳米结构及其自由能对滴状冷凝传热的影响[J].工程热物理学报,2009,30(10). |
| |
| 作者姓名： | 马学虎 汪明哲 兰忠 王四芳 李晓楠 |
| |
| 作者单位： | 大连理工大学化学工程研究所,辽宁大连,116012 |
| |
| 基金项目： | 国家自然科学基金，教育部新世纪优秀人才基金项目，大连理工大学博士启动基金 |
| |
| 摘 要： | 通过抛光和氧化刻蚀方法在基体壁面形成微米和纳米尺度的微观结构,然后制备十八烷基硫醇分子自组装膜,从而得到空气中表观接触角为160°的SAM-1表面和空气中表观接触角为116°的SAM-2表面.实验研究了常压条件下两类表面的滴状冷凝传热特性.结果表明两种表面都能够有效提高冷凝传热效果.但是,具有表面纳米结构的SAM-1表面的滴状冷凝传热特性低于SAM-2表面.分析了纳米结构和液固自由能差效应对滴状冷凝传热影响的共同作用机理.
|
| 关 键 词： | 滴状冷凝传热 表面自由能差 表面纳米结构 疏水表面 |
EFFECT OF SURFACE NANOSTRUCTURE AND SURFACE FREE ENERGY ON DROPWISE CONDENSATION HEAT TRANSFER |
| |
| MA Xue-Hu,WANG Ming-Zhe,LAN Zhong,WANG Si-Fang,LI Xiao-Nan.EFFECT OF SURFACE NANOSTRUCTURE AND SURFACE FREE ENERGY ON DROPWISE CONDENSATION HEAT TRANSFER[J].Journal of Engineering Thermophysics,2009,30(10). |
| |
| Authors: | MA Xue-Hu WANG Ming-Zhe LAN Zhong WANG Si-Fang LI Xiao-Nan |
| |
| Institution: | MA Xue-Hu WANG Ming-Zhe LAN Zhong WANG Si-Fang LI Xiao-Nan (Institute of Chemical Engineering,Dalian University of Technology,Dalian 116012 China) |
| |
| Abstract: | Fine polish and oxidation etching method are applied to prepare micro--and nano--structures on copper surfaces.After that,self-assembled monolayers(SAMs)of n-octadecyl mercaptan are coated on.In air circumstance,the contact angle of water on the nano-structured surface(SAM-1)is 160°and that on the finely polished coated surface fSAM-21 is 116..Both coated surfaces have promoted dropwise condensation very well.The condensation heat transfer performance of the SAM-2 is much better than that of the SAM-1.The coordinated effe!cts of difierence of surface free energy between nanostructure and liquid-solid on the dropwise condensation heat transfer are analyzed. |
| |
| Keywords: | dropwise condensation heat transfer surface free energy difference nanostructure hy-rophobic surface |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
