摇摆条件下矩形窄缝通道内汽泡脱离直径实验研究

摘要

The effect of rolling motion on bubble departure diameter at different mass flow rates was investigated in a narrow rectangular channel using deionized water as the working fluids .The results show that ,because of the local flow field fluctuation caused by rolling motion ,bubble grow th process becomes unstable and bubble departure diam-eter fluctuates within a certain range .This effect will be weakened with the increase of mass flow rate .By linear fitting ,it is indicated that the bubble departure diameter has a trend to be the smallest w hen the angular displacement of rolling motion is zero .%以去离子水为工质，可视化研究了矩形窄缝通道内不同质量流速下摇摆运动对汽泡脱离直径的影响。研究结果表明，由于摇摆运动引起的局部流场波动，汽泡生长过程变得不稳定，且汽泡脱离直径在一定范围内波动，这种效应会随质量流速的增大而减弱。线性拟合发现，摇摆角位移为0°时，汽泡脱离直径有最小的趋势。