摇摆条件对矩形通道内泡状流摩阻特性影响

摇摆运动作为一种典型海洋条件，对管内的气液两相流动过程产生较大影响。本工作通过摇摆条件下空气 水泡状流在矩形通道内流动阻力特性的实验，研究摇摆运动对两相流动过程的影响。实验在常温、常压下进行，通道尺寸为40 mm×10 mm，摇摆角度为10°、15°和30°，摇摆周期为8、12和16 s。结果表明，摇摆条件下瞬态摩擦压降的变化具有明显周期性，随着两相雷诺数变大，瞬态摩阻系数的波动幅度和平均水平均变小；摇摆周期越小，摇摆振幅越大，即摇摆运动越剧烈，摩擦压降的波动幅度也越大。

Research on Transient Flow Resistance of Bubbly Flow in Rectangular Channel Under Rolling Motions

Rolling motion, as a typical ocean condition, has an important influence on the two-phase flow resistance in rectangular channels. Frictional characteristics of air-water bubbly flow in vertical narrow rectangular channel were investigated under rolling motion and atmospheric conditions, hoping to clarify the effect of rolling motion on two-phase flow. The test-section had a cross section of 40 mm×10 mm and the rolling periods and angles were 8, 12, 16 s, and 10°, 15°, 30°, respectively. The experimental results show that the frictional pressure drop fluctuates periodically with the rolling period. The fluctuation amplitude of frictional pressure drop increases with the decrease of rolling period and the increase of rolling angle，and increase of the average quality would result in the increase of the fluctuation amplitude.