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Experimental study on sloshing flow in cylindrical tanks with internal structures
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PRE
AI
T
J
Y
C
J
DOI：10.1007/s42241-026-0043-8.png)
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Abstract
En 中文
In this study, a series of sloshing model tests were conducted on a cylindrical type-C tank to investigate the effects of internal members, such as a swash bulkhead and support rings. Under regular pitch motions, sloshing impact pressures and global forces at the tank base were simultaneously measured at high filling levels over excitation frequencies near its longitudinal resonance. Results showed that the internal members significantly modify both global and localized sloshing responses by altering free-surface patterns, momentum exchange pathways, and resonance behavior. Depending on the internal configuration, internal flow exhibited noticeable asymmetry, and the effective resonance frequency shifted. The global forces reached their maximum at intermediate filling levels and were strongly influenced by the geometric arrangement of the internal members. When the inner ring of the support ring or the opening of the swash bulkhead was located close to the free surface, horizontal fluid transport was restricted and vertical jet formation was promoted, leading to an upward concentration and localization of impact loads along spherical endcaps. These results demonstrate that the geometry and placement of internal members in type-C tanks not only attenuate sloshing loads but also actively redistribute fluid momentum, providing a quantitative basis for optimizing the internal-structure design and thereby improving operational performance and structural safety.
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