Simple Deployable Radiator with Autonomous Thermal Control Function
Simple Deployable Radiator with Autonomous Thermal Control Function
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DOI：
10.2514/1.17988
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发表时间：
2005-12
影响因子：
2.1
通讯作者：
H. Nagano;Y. Nagasaka;A. Ohnishi
中科院分区：
文献类型：
--
作者：
H. Nagano;Y. Nagasaka;A. Ohnishi
介绍了一种新型的、无源的、轻量化的、具有环境适应功能的100 W级可展开散热器--可逆热板的概念、详细设计、制造和测试结果。可逆热板通过在热耗散和热环境变化时展开/收起散热器/吸收器可逆翅片来可逆地将其功能从散热器改变为太阳能吸收器，并且对于高功率密度小型卫星、着陆器和行星际航天器的热控制是有效的。通过详细的仿真模型进行了参数研究，确定了在重量和翅片效率变化的约束下满足热要求的可逆热板结构。在此基础上，采用高导热石墨片作为可逆翅片，形状记忆合金作为被动展开/收起执行器，制作了可逆热板工程模型。试验结果表明，从散热能力、比散热量和翅片效率变化的角度来看，可逆热板作为被动散热器具有优异的性能。可逆热板作为太阳能吸收器，可以取代生存加热器的有效性也得到了证明。
The concept, detailed design, fabrication, and test results of a reversible thermal panel, which is a new, passive, and lightweight 100 W-class deployable radiator with an environment-adaptive function, is described. The reversible thermal panel changes its function reversibly from a radiator to a solar absorber by deploying/stowing the radiator/ absorber reversible fin upon changes in the heat dissipation and thermal environment, and is effective for the thermal control of high power density small satellites, landers, and interplanetary spacecrafts. Parametric studies were conducted with detailed simulation models, and the reversible thermal panel configuration that satisfies thermal requirements with the restraints of weight and fin efficiency variation was determined. Based on the analytical results, a reversible thermal panel engineering model was fabricated using high thermal conductivity graphite sheets in the reversible fin and a shape-memory alloy in the passive deployment/stowing actuator. Test results indicated excellent performance of the reversible thermal panel as a passive radiator from the standpoints of heat-rejection capability, specific heat rejection, and variation of the fin efficiency. The effectiveness of the reversible thermal panel as a solar absorber that can be substituted for a survival heater was also demonstrated.