Rolling motion, as a typical ocean condition, has an important influence on the gas and liquid two-phase flow resistance in rectangular channels. Flow resistance characteristics of air-water flow in vertical narrow rectangular channel were investigated under rolling motion and atmospheric conditions, aiming to clarify the effect of rolling motion on two-phase flow. The experiment is carried out under normal temperature and pressure, and the test channel has a cross section of 40 mm x 1. 6 mm and the rolling periods and angles are 8s, 12s, 16s, and 10°, 15°, 30°, respectively. The experimental results show that the drop of the instantaneous frictional pressure changes periodically under rolling conditions. The smaller the rolling period, the larger the rolling amplitude, i. e. the more intense the rolling motion, the larger the fluctuation amplitude of the friction pressure drop. The fluctuation scope of the friction pressure drop increases following the increase of the air content, and decreases following the increase of flowing speed.%摇摆运动作为一种典型的海洋条件,会对管内的气液两相流动过程产生较大影响.通过摇摆条件下空气-水在窄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.实验在常温常压条件下进行,通道尺寸为40 mm×1.6 mm,摇摆角度分别为10°、15°和30°,摇摆周期分别选为8、12、16 s.实验结果表明,摇摆条件下瞬态摩擦压降的变化具有明显的周期性,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；摩擦压降波动幅度随着含气率的增加而增加,随着流速的增加而减小.
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