摘要
多孔管是一种新型高效强化沸腾传热的换热管,对其沸腾传热的物理模型的研究是深刻理解其强化传热机理和今后改进该技术的前提。通过总结国内外相关研究工作,介绍了烧结型和机加工型多孔管沸腾传热的物理模型。重点分析了多孔层特征参数(多孔层厚度、当量半径和孔隙率)对强化传热的影响。同时对各种模型的优缺点进行了分析归纳,探讨了多孔管沸腾传热物理模型研究的发展方向,对今后的发展提出了自己的建议。
Porous surface tubes which are a kind of novel heat transfer tubes for enhancing heat exchanger efficiency are widely employed in the industries. The study of physical models for porous surface tubes is basic for understanding the mechanism of boiling heat transfer and its improvement. Several models about sintered and structured porous surface tubes were briefly reviewed. Effects of the characteristic parameters of porous surface layer （the thickness, equivalent radius and void fraction） on boiling heat transfer were analyzed. The advantage and disadvantage of the physical models of porous surface tubes were analyzed and summarized. Some problems on modeling of porous surface tubes were discussed, and some advices were given for understanding the mechanism on enhanced boiling heat transfer of porous surface tubes.
出处
《化学工程》
EI
CAS
CSCD
北大核心
2008年第1期17-20,共4页
Chemical Engineering(China)
基金
国家863计划项目(2006AA05Z206)
教育部博士点基金项目(20060251018)
关键词
物理模型
沸腾传热
多孔管
换热器
physical model
boiling heat transfer
porous surface tubes
heat exchangers
