球床通道内气液两相竖直向上流动流型实验研究  

Experimental Investigation on Flow Patterns of Gas-Liquid Two-Phase Upward Flow Through Packed Channel With Spheres

作　　者：张楠[1] 孙中宁[1] 赵忠南[1,2] 

机构地区：[1]哈尔滨工程大学核科学与技术学院,黑龙江哈尔滨150001 [2]华能山东石岛湾核电有限公司,山东荣成264312

出　　处：《原子能科学技术》2011年第9期1040-1044,共5页Atomic Energy Science and Technology

摘　　要：对球形颗粒填充通道内的空气-水竖直向上两相流动流型进行了可视化实验研究。实验段填充球直径分别为3、5和8 mm,气相表观流速为0.005～1.172 m/s;液相表观流速为0.004～0.093 m/s。实验观察得到4种典型流型:泡状流、串状流、液柱脉冲流和乳沫脉冲流,并绘制出流型图,其中脉冲流占据较大区域。通过与常规通道流型图对比发现:由于填充颗粒的影响,球床通道泡状流区域较常规通道显著减小。对比3种球床通道流型图得到:随着颗粒直径的增加,串状流区域增大;在低液相流速下,对于8 mm直径颗粒,串状流可直接过渡到乳沫脉冲流。Experiments of visualized two-phase upward flow were conducted in the packed channel,which filled with 3,5,8 mm in diameter of glass sphere respectively.The gas superficial velocity ranges from 0.005 to 1.172 m/s.The liquid superficial velocity ranges from 0.004 to 0.093 m/s.Four representative flow patterns were observed as bubbly flow,cluster flow,liquid-pulse flow and churn-pulse flow,and corresponding flow pattern maps were also presented.It is found that the pulse flow region is dominant.The comparisons of flow pattern map between packed channel and non-packed channel show that the bubbly flow region in packed channel is narrower than that of non-packed channel due to the packing.The comparisons of flow pattern maps for three different packing sizes show that the cluster flow region expands with the increase of the packing diameter.In the low liquid superficial velocity,the cluster flow directly changes to churn-pulse flow in the packed channel with 8 mm packing.

关 键 词：球床通道 气液两相流动 竖直向上 流型 

分 类 号：TK124[动力工程及工程热物理—工程热物理]