矩形窄缝近壁附近汽泡运动现象及分析  

Phenomenon and analysis of motive bubbles near the narrow side in a rectangular narrow channel

作　　者：徐建军[1] 陈炳德[1] 王小军[1] 熊万玉[1] 

机构地区：[1]中国核动力研究设计院空泡物理和自然循环国家级重点实验室,四川成都610041

出　　处：《化学工程》2007年第8期22-24,52,共4页Chemical Engineering(China)

摘　　要：为了深入了解矩形窄缝流道窄边加热区和非加热区附近的流动和换热特性,文中采用高速摄像仪观察和分析了矩形窄缝流道内窄边近壁面附近汽泡的运动行为。研究结果表明,窄边近壁面附近汽泡的运动形式较为复杂,汽泡可向窄边近壁面或流道中央或竖直方向运动,这种汽泡运动形式的多样性,有利于加热区和非加热区附近流体的交混;描述并建立了汽泡受力物理模型,分析了窄边近壁面汽泡的运动机理。To understand the flow and heat transfer characteristics between the heated region and unheated region near the narrow side in a rectangular narrow channel, the behavior of motive bubbles near the narrow side in a rectangular narrow channel was investigated and analysed by means of the high-speed digital camera. The results show that the behavior of motive bubbles near the narrow side was complex, and the bubbles can slide towards the narrow side or the center of channel or the vertical direction, the diversities of the motive bubbles contributed to the hydrodynamics exchange between the unheated region and the heated region. The physical model of a bubble was described and established, which can explain the mechanism of the motive bubbles near the narrow side.

关 键 词：窄缝 窄边 汽泡 

分 类 号：TK124[动力工程及工程热物理—工程热物理]