円筒型タンク上面に働く流体力について

概要

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Flow around a cylindrical tank top, especially cavity flow in a tank, is investigated by means of pressure measurement and flow visualization. The experiment is performed at a circulating water channel for various cases where the height and the position of the roof of tank are changed. The ratios of the height and diameter of the tank are 0.5, 0.75, 1.0 and 1.25. The tank model is attached on a flat plate whose lengh and breadth are 10D and 5D (D: diameter of tank). Hydraulic force acting on the top of cylindrical tank increases as the position of the roof lowered. By means of flow visualization, it is found that the increase of force is due to the vortical flow in the cavity. The vortical flow affects the fluctuation of the pressure distribution. Such a vortical flow is not observed when the tank roof locates at the tank top.
社団法人日本船舶海洋工学会の論文
1991-09-04