微流体系统中沸腾特性的研究进展  

Research Progress of the Boiling Characteristics in the Micro Fluidic System

作　　者：吕泽 徐进良[1,2] 余雄江 金武 

机构地区：[1]华北电力大学北京市新能源与可再生能源重点实验室,北京102206 [2]华北电力大学新能源电力系统国家重点实验室,北京102206

出　　处：《微纳电子技术》2014年第11期724-730,共7页Micronanoelectronic Technology

基　　金：国家自然科学基金国际合作与交流资助项目(51210011);国家自然科学基金-广东联合基金资助项目(U1034004)

摘　　要：通过分析微流体系统沸腾过程中两相流流型、压降特性和传热特性三个关键问题,总结了微流体系统中沸腾特性的研究进展。分散流、间歇流和环状流是微通道的三类基本流型。流型和传热分析中考虑了壁面润湿性、表面粗糙度及表面缺陷等因素。提出了横跨大尺度到微尺度的综合型流型图和压降预测方法的基本构想。微尺度相变传热领域还需要在流型转化界限、传热分区及预测、临界热流密度等方面进行深入研究,对新型通道结构、新的混合流体和新的应用背景下的特殊流体进行更为广泛的讨论,为微蒸发器的设计、制造及运行提供参考。By analyzing three key issues, i.e. two-phase flow regime, pressure drop characteris- tics and heat transfer coefficient, the research progress of the boiling characteristics in the mi- crofluidic system is reviewed. The dispersed flow, intermittent flow and annular flow are the three basic types of the microchannels. The surface wettability, surface roughness and surface imperfection are considered in the flow regime and heat transfer analysis. A new concept of multi- scale flow regime and multi-scale pressure drop prediction method are proposed. In the field of flow boiling and heat transfer in microchannels, more attentions should be paid on fundamental researches of the flow regime transition limit, heat transfer partition and prediction, and critical heat flux density. More discussions on new type micro-channels, novel mixed fluid flow and spe- cific fluid in new applications are discussed widely, which can offer reference for the design, fab- rication and operation of micro-evaporators.

关 键 词：微流体系统 两相流流型 沸腾换热 压降特性 传热系数 

分 类 号：O35[理学—流体力学] TH703[理学—力学]