Thermal Insulation Design of the Optical Measurement Device Used in Liquid Oxygen Tank

Based on the characteristics of low temperature and strong oxidation of liquid oxygen, a new temperature control method is proposed for optical measurement device in liquid oxygen medium. In order to ensure the temperature of the optical system satisfied the design requirements, the polyurethane is used as insulation materials and the heat-insulating is considered for the initial part design to increase the thermal resistance between optical system and the outside environment (passive thermal control). At the same time, the method of heating the optical lens with an electric heating film is adopted for active thermal control. According to the heat transfer theory, we analyze the heat transmission patterns and the heat influencing factors of the optical system. Making the finite element model of the optical measurement device on the ANSYS Workbench software, and simulate the heat transmission for different thickness and heating power. The result shows that the design of the optical measurement device is satisfied when the thickness of the insulating layer is 20mm, and the heating power is 19W.