中文摘要：

在3种不同摇摆周期（5s、10s、15s）、2种不同摇摆角度（10°、20°）的情况下,分别对3种不同管径（15mm、25mm、34.5mm）的竖直光滑有机玻璃管管内单相水的阻力特性进行了实验研究。经实验研究发现,试验段内的摩擦阻力系数随时间变化有明显的周期性,雷诺数增加导致摩擦阻力系数的波动幅值降低、平均值减小,管径越粗使得摩擦阻力系数λ的波动幅度越大。在任意时刻,摩擦阻力系数的瞬态值随周期的变长而增加,但是摇摆角度的变化对摩擦阻力系数的影响不是很显著。

英文摘要：

Experimental studies of single-phase pressure drop in rolling pipes were carried out. The inside diameters of three pipes which were fixed on the rolling platform were 15mm, 25mm, and 34.5mm respectively, the rolling periods of the rolling platform could be set as 5s, 10s, 15s, and rolling angles of the rolling platform were 10° and 20°. The experimental results showed that the frictional factor periodically fluctuated with the time variable, and its amplitude was obviously affected by the change of Reynolds number and pipe diameters. The amplitude and average value of frictional factor both decreased with the increase of Re number, but the bigger the tube diameter was, the larger the amplitude of frictional factor was. At any moment, the transient frictional factor increased with the increase of rolling period. However, the effect of changing rolling angles on the frictional factor was not obvious.