摘要
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。
The motion of a bubble in waves was investigated experimentally in this article. The mean rising velocity of a bubble in waves and the motion orbits of bubbles were gotten and compared with theory. It was found that when the diameter of a bubble was smaller than 1mm, the mean rising velocity of a bubble in waves was almost the same as the steady rising velocity in quiescent water. The effect of waves was small and random. When the diameter of a bubble was greater than 1mm, the mean velocity of a bubble in waves did not increase with the increase of the bubble diameter, and it would get to a constant value. This was the same as the situation in quiescent water. When the diameter of a bubble was smaller than 1mm and the distance from the free surface was greater than the wave height, the theoretical results were in close agreement with measurements.When a bubble was near the free surface, there were some differences between experiment and theory because of the effect of the free surface.
出处
《水动力学研究与进展（A辑）》
CSCD
北大核心
1997年第3期315-321,共7页
Chinese Journal of Hydrodynamics
基金
国家自然科学基金委资助课题
