Investigation on Thermal Behavior During Pressurization Discharge of Liquid Oxygen Under Different Acceleration Levels

Abstract Cryogenic pressurization discharge involves on complex heat exchange and fluid flow issues, the related thermal physical performance should be comprehensively investigated. In this study, a two-dimensional axisymmetric numerical model is adopted to research outflow characteristic from cylindrical liquid oxygen storage tank with gas injection. The VOF method utilized predict 360 K high-temperature gaseous as pressurant gas. Validated against hydrogen experiments, turned out proper acceptable calculation errors limited within 20%. On basis of model, effect flight acceleration level are numerically simulated analyzed, injection rate 0.18 kg/s 36.0 kg/s. Some valuable conclusions obtained finally. present study significant safety launch vehicle may supply some technical supports for design cryogenic propellant system.