摇摆条件下窄矩形通道内两相流动瞬态阻力特性研究

摇摆条件下的气液两相流动受摇摆引起的附加惯性力的影响，致使其摩擦阻力特性发生改变。本工作在摇摆周期为8、12、16 s和摇摆振幅为10°、15°、30°的条件下，对窄矩形通道（40 mm×1.6 mm）内空气-水两相流动的瞬态阻力特性进行了研究。结果表明：摇摆时瞬态摩阻系数的变化呈明显周期性；气相质量含气率越大，摩擦压降的波动幅度越大；摇摆周期越小，振幅越大，摩擦压降的波动幅度越大。给出1个用于计算摇摆条件下两相摩阻系数的关联式，92.5%的计算值的相对误差在±20%以内

Research on Transient Flow Resistance of Two-phase Flow in Narrow Rectangular Channel in Rolling Motions

The additional force arising from rolling motion causes the change of two-phase flow resistance. The characteristics of air-water mixture flow resistance in narrow rectangular channel (40 mm×1.6 mm) in rolling motions were experimentally studied with the rolling periods of 8 s, 12 s, 16 s and the angles of 10°, 15°, 30°, respectively. The experimental results show that the transient frictional factor changes periodically. The larger the mass quality and the maximum rolling angle and the smaller the rolling period, the larger the fluctuation amplitude of frictional pressure drop. A new correction for predicting the transient frictional factor of two-phase flow in rolling motion is proposed with a good accuracy.