摘要
本文结合可视化实验技术对多孔球层内汽液两相流动作深入观察和分析。根据汽泡与多孔球层的相互作用,定义汽泡输运的临界半径并建立汽泡输运的动力学模型。在实验观察和合理假设的基础上,定量讨论了汽相流动由分散态到连续态的转变,确定了临界转变点。
Influenced by complexity of geometrical configuration, liquid-vapor two-phase flow in porous media appears many strange features. Employing visual observation technology, this paper conducts an experimental investigation to observe liquid-vapor two-phase flow, particularly vapor phase transport in bead-packed structures. The critical bubble diameter is defined to classify the bubbles in the two-phase flow according to their interactions with geometrical configuration. A dynamic model of bubble motion is proposed. The transition of from non-continuous to continuous vapor flow and the corresponding criterion of transition are also determined based on the reasonable presumption and experimental information.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2004年第6期1007-1009,共3页
Journal of Engineering Thermophysics
基金
国家自然科学基金重点项目资助(No.50136020)
关键词
多孔球层
多相流动
临界直径
流态
bead-packed structure
multiphase flow
critical diameter
flow mode
