슬로싱 거동을 고려한 극저온 저장용기의 구조 안전성 평가

• Published in: 한국수소 및 신에너지학회 논문집 Vol. 36; no. 2; pp. 119 - 128
• Main Authors: 고인재, 강효림, 김경수, 임동우, 한승호, INJAE KO, HYOLIM KANG, KYUNGSOO KIM, DONGWOO LIM, SEUNGHO HAN
• Format: Journal Article
• Language: Korean
• Published: 한국수소및신에너지학회 01.04.2025
• Subjects: 기계공학; -
• ISSN: 1738-7264; 2288-7407
• DOI: 10.7316/JHNE.2025.36.2.119

Cryogenic vessels are used to store liquid hydrogen at 20 K. During transportation, however, structural safety concerns arise due to sloshing-induced impact pressure. This study evaluated the sloshing behaviors in a vertical vacuum-jacketed vessel through multiphase fluid flow and fluid structure interaction (FSI) analysis. When the inner vessel was 50% filled with liquid nitrogen and subjected to an acceleration of 12 m/s2, the maximum pressure of 6,340 Pa was obtained from the multiphase fluid flow analysis. The FSI analysis revealed that the maximum stress at rod connection was 242 MPa, exceeding allowable strength. To address this issue, a case study on increasing the rod's diameter showed that the rod's diameter of 6 mm reduced the maximum stress to 111 MPa, ensuring it remained within the allowable strength.