摇摆状态下窄通道内单相阻力特性实验研究

Single-phase Flow Characteristics in Narrow Channel Under Rolling Motion

摘要: 在3种不同摇摆周期(8、12、16 s)和3种不同摇摆角度(10°、15°、30°)下，对内壁光滑的窄矩形通道内的单相阻力特性进行了实验研究。经实验研究发现，摩擦阻力系数随时间变化有明显的周期性。雷诺数越大，摩擦阻力系数的波动幅值越小，平均值也越小。在任意时刻，摩擦阻力系数的波动幅值随摇摆角加速度的增大而增大。

Abstract: Experimental studies of singlephase pressure drop in narrow rectangular channel under rolling motion were carried out. The rolling periods were 8, 12, 16 s, and the rolling angles were 10°, 15°, 30°. Experimental results show that the frictional factors periodically fluctuate with time. The amplitude and average value of frictional factors decrease with the increasing of Reynolds numbers. At any moment, the transient frictional factors increase with the increasing of rolling angular acceleration.