狭缝流动沸腾强化传热机理的探讨  

Exploration on the Mechanism of Heat Transfer Enhancement in Flow Boiling through Narrow Channels

作　　者：苏顺玉[1] 黄素逸[1] 

机构地区：[1]华中科技大学能源与动力工程学院,武汉430074

出　　处：《科学技术与工程》2004年第2期108-110,共3页Science Technology and Engineering

基　　金：国家自然科学基金(50076014);国家重点基础研究发展规划项目(G2000026303)资助

摘　　要：假定总热流密度来自对流和汽泡潜热两种成份的叠加,从理论上分析了狭缝通道中流动沸腾传热的机理,揭示了沸腾换热系数与通道尺寸之间的关系,从而证明了狭缝通道能强化传热,并以间隙为1mm和1.5mm的环形狭缝通道中流动沸腾传热的实验数据进行了检验。Supposing that the whole heat flux is made up of heat flux of convection and latent heat of bubbles, the mechanism of heat transfer enhancement in flow boiling through narrow channels is analyzed theoretically. The relation between the heat transfer coefficient of boiling heat transfer and the dimension of channels is shown up, and then it's proved that narrow channels could enhance heat transfer. Its tested based on the experimental data of boiling heat transfer through annular channels with the gaps of 1 mm and 1. 5 mm.

关 键 词：狭缝 流动沸腾 传热机理 换热系数 通道尺寸 

分 类 号：TK124[动力工程及工程热物理—工程热物理]