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针对登月航天器激光载荷热控要求设计了一种采用十八烷作为相变材料的热控装置,使用ANSYS有限元分析软件对该装置的壳体进行了耐压强度分析,并搭建了实验装置,对该热控装置在振动条件以及真空热条件下的力学特性进行了实验研究.结果表明,在实验范围内,相变材料热控装置的壳体不会发生塑性形变和泄露.同时对其升温特性进行了实验研究,分别探讨了不同加热功率以及重力对相变材料升温特性的影响,实验结果表明,相变材料固液共存阶段比单相阶段的升温速率慢、历时长且吸收的热量多,同时,相变材料在发生相变时引起的自然对流对换热的整体效果影响可以忽略.
A thermal control device using octadecane as phase change material was designed for the laser load thermal control requirements of the lunar spacecraft. The ANSYS finite element analysis software was used to analyze the compressive strength of the device and the experiment The experimental results show that the shell of the thermal control device of phase change material will not undergo plastic deformation and leakage within the experimental range, meanwhile, the mechanical properties of the thermal control device under the condition of vibration and vacuum heat are studied experimentally The effects of different heating powers and gravity on the temperature-rising characteristics of phase-change materials were investigated. The experimental results show that the solid-liquid phase transition materials have a slower heating rate, longer duration and higher absorption At the same time, the effect of natural convection caused by the phase change material on the heat transfer is negligible.