毛细微槽中汽泡动力学行为可视化研究  

THE VISUALIZATION OF MICRO-BUBBLE DYNAMIC BEHAVIOR IN CAPILLARY MICROGROOVES

作　　者：武利媛[1] 胡学功[1] 唐大伟[1] 

机构地区：[1]中国科学院工程热物理研究所,北京100190

出　　处：《工程热物理学报》2009年第7期1175-1177,共3页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.50776088)

摘　　要：本文在透明的硼硅玻璃表面加工矩形毛细微槽,利用高速摄影仪对竖直开放式毛细微槽中的汽泡动力学行为进行了可视化研究。研究结果证实了在竖直微槽中不存在汽泡脱离壁面的现象。同时实验结果表明:汽泡生长可分为三个不同的阶段,且生命周期大为缩短;常规尺寸的池沸腾理论预测模型已不能很好地预测其生长规律。Rectangular capillary nficrogrooves are processed on transparent boroscilicate glass. Using high-speed photography, bubble dynamic behaviors in the microgrooves are observed and analyzed. It is proved that no bubble departs from the bottom of microgrooves. The result shows that the whole bubble lifecycle can be divided into three distinct stages according to growing velocity. Compared with macroscopic pool boiling phenomenon, bubble lifecycle shortens greatly. Experimental results about time-varying micro bubble sizes are distinctly different from those of theoretical calculation results by dynamic microlayer model for nucleate pool boiling heat transfer.

关 键 词：毛细微槽 汽泡动力学 可视化 

分 类 号：TK124[动力工程及工程热物理—工程热物理]