리브 구조를 갖는 차량용 액체수소 탱크 내 슬로싱 억제와 증발률 저감 효과에 대한 분석 = Investigation of sloshing suppression and evaporation rate decrease in a liquid hydrogen tank with rib structures for automotive use

다국어 초록 (Multilingual Abstract)

In liquid hydrogen (LH2) fuel tanks, sloshing induced by driving conditions increases LH2 evaporation, reducing storage efficiency. This study conducts numerical simulations to investigate sloshing-induced evaporation in an LH2 tank subjected to constant wall heat flux. We observe that sloshing leads to the formation of a high-temperature area near the tank’s side walls, accompanied by the development of an LH2 film. This thin LH2 film maintains direct contact with the heated walls during sloshing, causing significant evaporation. To suppress the formation of the LH2 film, rib structures are installed on both side walls. These rib structures reduce the flow length of the LH2 film along the wall by 31.8%, thereby decreasing the peak evaporation rate by 30.9%. Consequently, cumulative evaporation over a 20-second period is reduced by 10.3%. These results demonstrate that integrating rib structures into liquid hydrogen fuel tanks effectively mitigates sloshing-induced evaporation.