Numerical Simulation of 1.8 K–300 K Sub-Atmospheric Helium Heating Device

The 1.8 K–300 K sub-atmospheric helium heating device is an important component of 1.8 K cryogenic test platform. The process design of the 1.8 K–300 K sub-atmospheric helium heating device is completed. A three-dimensional model is established, and numerical simulation of flow and heat transfer characteristics is studied by CFD software. Physical properties of helium used in the simulation adopt the interpolation method to call HEPAK, and SST k-ω turbulence model is adopted for simulation. The simulation results show that the outlet temperature of the 1.8 K–300 K sub-atmospheric helium heating device can reach 289.56 K which is close to room temperature when the heating power is 9 kW, and the pressure drop of helium gas is 7.6 Pa which is far less than the maximum pressure drop restriction (50 Pa@6 g/s). The simulation results show that the design of the 1.8 K–300 K sub-atmospheric helium heating device can meet the engineering requirements.