Journal of the Korean Society of Visualization (한국가시화정보학회지)

The Korean Society of Visualization (한국가시화정보학회)
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Design of Sidewall Ribs for Suppressing Vortex Structures and Reducing Evaporation Rate in Liquid Hydrogen Storage Tank

액체수소 저장용기의 와류 구조 억제 및 증발률 저감을 위한 측벽 rib 설계

  • Byeonggeon Kim (School of Mechanical Engineering, Pusan National University) ;
  • Hyungi Kim (School of Mechanical Engineering, Pusan National University) ;
  • Yunjeong Park (School of Mechanical Engineering, Pusan National University) ;
  • Mingyu Im (School of Mechanical Engineering, Pusan National University) ;
  • Sungwoo Park (School of Mechanical Engineering, Pusan National University) ;
  • Jinyul Hwang (School of Mechanical Engineering, Pusan National University)
  • 김병건 ;
  • 김현기 ;
  • 박윤정 ;
  • 임민규 ;
  • 박성우 ;
  • 황진율
  • Received : 2024.02.22
  • Accepted : 2024.03.29
  • Published : 2024.07.31
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Abstract

We performed numerical simulations on a C-type liquid hydrogen (LH2) storage tank for commercial vehicles to reduce evaporation rates by manipulating vortical structures. Owing to external heat, natural convection occurs inside the tank, leading to the enhanced evaporation of LH2. We observed that the regions of high magnitude vorticity correlate with those of high evaporation rates. Specifically, vortical structures in the side section area show higher vorticity magnitude and evaporation rates compared to those in the midsection area. To suppress these vortical motions, we installed an array of ribs at intervals corresponding to the mean diameter of the vortical structures. As a result, the area occupied by vortical structures in the side section area decreased, leading to a reduction in evaporation speed by approximately 2.3 times. This study elucidates the internal evaporation mechanism in storage tanks from the perspective of flow structures and potentially contributes to minimizing the boil-off rate in cryogenic storage tanks.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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