摘要
实验测定了相同操作条件下涂层表面1:1分割前后水蒸汽冷凝传热通量与表面过冷度的关系,对分割表面上滴膜共存冷凝进行了研究,结果表明,分割表面上滴膜共存时的热通量比全部为滴状和膜状冷凝表面热通量的平均值大,且其差值随处理表面上接触角的增大而增大.从固液界面效应的角度对该现象进行了分析,并解释了其原因.
The relations of water vapor condensation heat fluxes with surface subcoolings on coated surfaces were determined experimentally, and the experimental results with and without dividing surfaces with the ratio of 1：1 were also compared. It was observed that the heat fluxes of dropwise-filmwise coexisting condensations （DFC） on dividing surfaces were more than the mean fluxes of pure dropwise and filmwise condensations （MDF） on coated and bare surfaces, respectively, and the differences between them increased with increasing the contact angles on the coated surfaces. The phenomenon was explained from the point of view of interracial energy effect of condensate and solid.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2007年第3期472-475,共4页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:59906002
50376005)
辽宁省自然科学基金资助项目(编号:20032130)
关键词
滴膜共存冷凝
界面效应
分割表面
强化传热
dropwise-filmwise coexisting condensation
interracial energy effect
dividing surface
heat transfer enhancement
