Abstract This paper reports an experimental study of single Taylor bubbles rising in stagnant water-glycerin mixtures inside slightly deviated cylindrical tubes. The inclination angles studied were 0°, 2.5°, 5°, 7.5°, 10° and 15° from the vertical. The rise bubble velocity and the shape of the bubbles at two vertical orthogonal planes that intersect at the tube axis were measured by using a pulse-echo ultrasonic technique. Thus, the liquid films draining at the top, bottom and lateral sides of the bubbles were observed. The experimental results indicated that for all liquid mixtures studied, the bubble velocity increased when the inclination angle was increased, and that the bubble velocity was independent of the bubble length. The influence of liquid properties and of tube diameter on the bubble movement and shape were evaluated for deviated angles ranging from 0° to 15°. Different correlations to predict the drift velocity of Taylor bubbles rising in inclined tubes were tested for this particular range of inclination.

中文翻译：

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单个泰勒气泡在垂直微偏圆管中上升的实验研究

摘要 本文报道了在略微偏斜的圆柱形管内的停滞的水-甘油混合物中上升的单个泰勒气泡的实验研究。研究的倾斜角为 0°、2.5°、5°、7.5°、10° 和 15° 与垂直方向。通过使用脉冲回波超声技术测量在管轴相交的两个垂直正交平面上的气泡上升速度和气泡形状。因此，观察到在气泡的顶部、底部和侧面排出的液膜。实验结果表明，对于所研究的所有液体混合物，随着倾斜角的增加，气泡速度增加，并且气泡速度与气泡长度无关。液体性质和管径对气泡运动和形状的影响在 0° 到 15° 的偏角范围内进行了评估。针对这个特定的倾角范围，测试了用于预测在倾斜管中上升的泰勒气泡的漂移速度的不同相关性。