球床通道内气液两相竖直向上流动流型实验研究

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8mm，气相表观流速为0.005~1.172m/s；液相表观流速为0.004~0.093m/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8mm直径颗粒，串状流可直接过渡到乳沫脉冲流。

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

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 comparison...