The two-phase cryogenic tank model considers liquid hydrogen in its own vapor with liquid density varying with temperature only and a fully compressible ullage. The axisymmetric model is developed using a custom version of the commercially available
Cryogenic Pressure Control Modeling for Ellipsoidal Space Tanks
2013年8月24日 · A computational fluid dynamics (CFD) model is developed to simulate pressure control of an ellipsoidal-shaped liquid hydrogen tank under external heating in normal gravity.
Modelling and Designing Cryogenic Hydrogen Tanks for …
The analysis shows that cryogenic hydrogen tanks are highly competitive with kerosene tanks in terms of overall mass, which is further improved by the use of a fuel cell. In the near future, the challenges to reduce the economic and social dependency on fossil fuels must be …
Design of Thermally Efficient Cryogenic Tanks for Spacecraft
2024年7月25日 · In this study, we first developed models to represent the various physics relevant to cryogenic propellant tanks, such as vapor permeability, tank structure, and heat transfer characteristics. These models were then used to explore various design choices to minimize propellant lost to diffusion through the tank structure, boil-off, and venting.
Numerical Simulation on Interface Evolution and Pressurization ...
2019年9月6日 · To quickly and accurately predict the phase distribution, temperature profile, and pressure variation of the cryogenic propellant in tank in microgravity environment, a three-dimensional CFD model based on VOF method has been established for the self-pressurization process modeling.
Cryogenic Pressure Control Modeling for Ellipsoidal Space Tanks …
A computational fluid dynamics (CFD) model is developed to simulate pressure control of an ellipsoidal-shaped liquid hydrogen tank under external heating in low gravity. Pressure control is provided by an axial jet thermodynamic vent system (TVS) centered within the vessel that injects cooler liquid into the tank, mixing the contents and ...
Cryogenic liquid propellant is subject to various external heat loads during the flight of the spacecraft, which causes part of the cryogenic liquid to evaporate and form a vapor region inside the tank (Zuo et al. 2018). Due to the lower specific heat capacity of the vapor, the pressure in …
A Cryogenic Tank Thermodynamic Process Model for Marine …
2 天之前 · The systems consist of tanks, piping, and cryogenic process equipment to manage the boil-off, and pressure accumulation due to external heat ingress. This work introduces a generic thermodynamic model for cryogenic tanks that can manage various fuel and CO₂ mixtures and be integrated with broader marine cryogenic gas handling systems.
Feasibility Study on Space Reorientation for Liquid Hydrogen Tanks …
2023年4月20日 · The feasibility of the common bulkhead tank in realizing thrust or rotation reorientation by evaporated exhaust gas has been systematically studied. The results indicate that the space radiation heat leak is the primary heat leak in …
The two-phase cryogenic tank model considers liquid hydrogen in its own vapor with liquid density varying with temperature only and a fully compressible ullage. The axisymmetric model is developed using a custom version of the commercially available