In this study, a series of sloshing model tests were conducted for type-C tanks, particularly to observe the effects of the inner bulkhead and rings. In regular pitch motion, the internal flow by swash bulkhead and rings located inside the tank was observed. The frequency range near the resonance frequency was checked at filling heights of 70%, and sloshing-induced impact pressures were investigated. Through this study, the global flows inside the tank and local flows during impact occurrence at the hemispherical end of the tank were systematically observed, and the impact pressure pattern for each frequency ratio was compared. Due to the swash bulkhead located in the center of the tank, the flow does not move at once and the velocity of the flow is reduced by the inner rings. The flows passing through the swash bulkhead proceed with a time difference, overlapping with the first wave, generating various types of sloshing impact. The results of computational fluid dynamics calculation and the experiment were also compared for limited conditions.

中文翻译：

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带斜隔板的圆柱形液化天然气储罐晃荡流动和动水压力的观测

本研究对C型液舱进行了一系列晃荡模型试验，特别是观察内舱壁和环的影响。在规则的俯仰运动中，观察到位于油箱内的斜隔板和环的内部流动。在 70% 的填充高度检查共振频率附近的频率范围，并研究晃动引起的冲击压力。通过这项研究，系统地观察了罐内的整体流动和罐半球端冲击发生时的局部流动，并比较了每个频率比的冲击压力模式。由于斜隔板位于油箱中心，因此流量不会立即移动，并且内环降低了流量的速度。通过斜舱壁的水流以时差进行，与第一波重叠，产生各种类型的晃荡冲击。计算流体动力学计算的结果和实验也对有限条件进行了比较。