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本文对气泡在波浪中的运动进行了实验研究,得到了气泡在波浪中运动的平均上升速度及上升运动轨迹,并同理论进行了比较。发现当气泡直径小于1mm时,气泡在波浪中的平均上升速度与静水中的稳定上升速度基本一致,波浪的影响很小,且是随机的。当气泡直径大于1mm时,气泡在波浪中的平均上升速度不再随直径增大而增大,而是趋向于某一定值。这与气泡在静水中稳定上升速度的变化趋势是一致的。当气泡直径小于1mm且气泡到液面的距离大于波高时,实验和理论符合得很好。当气泡上升到液面附近,气泡到液面的距离和波高为同一量级时,由于自由面的影响,理论和实验有一定差别。
In this paper, the bubble in the waves of the movement of the experimental study has been bubble in the waves of the average rate of rise in the movement and rising trajectory, and with the theory were compared. It is found that when the bubble diameter is less than 1 mm, the average rising velocity of the bubble in the wave is basically the same as the steady rising velocity in the still water, and the influence of the wave is small and random. When the bubble diameter is larger than 1mm, the average rising speed of the bubble in the wave no longer increases with the diameter, but tends to a certain value. This is consistent with the trend of steady rising velocity of bubbles in still water. When the bubble diameter is less than 1mm and the bubble to liquid level is greater than the wave height, the experimental and theoretical fit well. When the bubble rises to the liquid level, the bubble to the liquid surface distance and wave height of the same order of magnitude, due to the influence of the free surface, the theory and experiment have some differences.