Measurement of Averaged Liquid Velocity Field around Large Bubbles Using UVP
Measurement of Averaged Liquid Velocity Field around Large Bubbles Using UVP
复制标题
使用 UVP 测量大气泡周围的平均液体速度场
DOI：
10.1299/kikaib.72.345
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
Y. Shiomi
中科院分区：
文献类型：
--
作者：
H. Minagawa;T. Fukazawa;Y. Nakazawa;S. Yamada;Y. Shiomi
为了获得气液两相弹状流的基本信息，在内径D=54 mm的圆管中，利用超声速度剖面仪（UVP）测量了大气泡在静水中上升前后的平均速度场。采用两个超声波传感器进行测量，得到速度矢量。测量结果，并与一些现有的研究相应的现象。在气泡鼻附近的液膜，速度分布，并与现有的研究进行比较。D的不同可能会影响某些特征。参数z/D被发现比z更主导这种现象。在气泡尾部或尾流区后面的液相中，识别出大的环形涡。文中还讨论了气泡长度对旋涡的影响。管轴处的上升速度与已有的预测结果吻合较好。
An Ultrasonic Velocity Profile monitor (UVP) measurement was performed to measure the averaged liquid velocity field in front of, around and behind the large bubble rising in stagnant water in a round pipe of inner diameter D=54 mm in order to obtain fundamental information for the gas liquid two-phase slug flows. Two ultrasonic transducers were used for the measurement to get velocity vectors. The measured results are presented and compared with some existing studies on the corresponding phenomena. In the liquid film near the bubble nose, velocity profiles are presented and compared with existing studies. The different of D may affect some features. The parameter z/D is found more dominant than z for this phenomenon. In the liquid phase behind the bubble tail or the wake region, a large ring vortex is recognized. The effect of bubble length on the vortex is also discussed. The upward velocity at the pipe axis agrees well the predicted results by an existing prediction.