竖直矩形可视化流动沸腾换热实验台的设计及初步研究  

Design and Preliminary Study on Vertical Rectangle Visualization of Flow Boiling Heat Transfer Experiment Platform

作　　者：郑志皋[1] 陶乐仁[1] 黄理浩[1] 芮胜军[1] 张庆钢[1] 薛维超[1] 高立博[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《制冷学报》2013年第1期61-64,共4页Journal of Refrigeration

基　　金：国家高科技研究发展计划(2008AA05Z204)资助项目~~

摘　　要：为了了解矩形窄通道内流动沸腾及传热现象的机理,建立了单面加热竖直矩形窄通道可视化流动沸腾换热实验台进行了实验。实验结果表明:矩形窄通道流动沸腾过程的换热系数存在最大值;随着干度的增加(即热流密度的增加)其换热系数逐渐降低,转为以液膜蒸发为主的流动沸腾换热,此时需控制热流密度,避免干涸现象的发生。A single-side heating apparatus is set up to study the flow boiling and heat transfer in vertical narrow rectangular channel together with high speed video camera to get the flow images in the channel. The experiment results show that： the heat transfer coefficient exists a maximum value; Heat transfer coefficient gradually decreases with increasing thermodynamic vapour quality （heat flux increasing）, and flow type tunas to liquid film evaporation, at this case it necessarily needs to control heat flux to avoid the occurrence of dry-out.

关 键 词：流动沸腾 矩形窄通道 液膜蒸发 干涸 可视化 

分 类 号：TK124[动力工程及工程热物理—工程热物理] TQ051.5[动力工程及工程热物理—热能工程]