Investigation of the Chill-Down Behavior and Thermal Stress Distribution of a Cryogenic Tank During the Filling Process

A numerical study is conducted to investigate the filling process of a specified cryogenic tank. The chill-down behavior of the tank isanalyzed by a computational fluid dynamics method considering the effect of the inflow rate and the state of the fill substance. In addition, the transient thermal stress within the tank wall during filling processes is analyzed using the finite element method. Numerical results show that the thermal stress is dominated by restricting conditions as well as the temperature distribution, which is controlled by the fluid field and heat transfer types within the tank.