액체수소 탱크 슬로싱 파라미터와 리브구조가 내부유동에 미치는 영향에 관한 수치적 연구

Abstract

Sloshing occurs in the partially filled tank under external acceleration. The sloshing dynamics in the liquid hydrogen tank are influenced by the frequency and amplitude of loading conditions, hydrogen filling level, the geometry of the tank, and wave motion. The 30 %, 50 %, and 90 % hydrogen filling levels are selected to evaluate the sloshing dynamics. The pure surge motion is exerted to visualize the free surface movement. Finally, the rib structure is applied in the liquid hydrogen tank to reduce sloshing dynamics. Rib structures of various lengths are employed in the tank to minimize violent oscillation. The long rib structure is more effective in preventing violent free surface fluctuation than the shorter one. Furthermore, FSI analysis showed that the liquid hydrogen tank is structurally safe even with the addition of a rib structure.