2024 Volume 38 Issue 1 Pages 32-39
Long-term storage of cryogenic propellants such as liquid hydrogen and liquid oxygen is required for manned long-distance exploration of deep space. In propellant tank, evaporation from the gas-liquid interface is accelerated by sunlight and heat input from surrounding equipment, and the boil-off gas (BOG) generated from the liquid surface, it is caused pressure raise in the tank and could lead to tank destruction. Therefore, the development of Thermodynamic Vent System (TVS) to reduce BOG generation is urgently needed. An effective way to reduce BOG is to agitate the bulk liquid by mixing cold jet issuing from the bottom of the tank. Here, to estimate the jet-tip height, one-dimensional dynamic model is described. And the height of the jet-tip is investigated under various gravitational conditions, and the experimental results compared to the results obtained from the dynamic model.
