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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Testing and analysis of a morphing radiator concept for thermal control of crewed space vehicles
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Testing and analysis of a morphing radiator concept for thermal control of crewed space vehicles

机译：用于热控空间车辆热控制变形散热器概念的测试与分析

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Spacecraft designed for future missions must satisfy increasingly difficult thermal requirements. Crewed vehicles, in particular, must maintain a relatively constant temperature irrespective of external conditions; this is the role of the thermal control system (TCS). A TCS may be required to reject a higher heat load to warm environments and a lower heat load to cold environments, necessitating a high turndown ratio, often on the order of 12:1. This work presents a novel radiator concept that employs shape memory alloys (SMAs) to geometrically reconfigure the radiator, enabling a lighter TCS for space exploration vehicles. The thermally driven morphing effect allows passive control of both radiator view of space and primary surface emissivity. Thermal modeling of the morphing radiator predicts a turndown ratio ranging from 12:1 to 35:1 independent of the other aspects of TCS configuration. A system-level mass analysis shows that by enabling a single-loop architecture, this design could reduce the TCS mass by approximately 25%. Two benchtop prototypes provide proof-of-concept demonstrations of the radiator's principles of operation. Additionally, an analysis framework is developed for the first time that is capable of simulating the unique and highly nonlinear thermomechanical coupling present in the radiator. The framework provides high-fidelity results of both the stress in the radiator as well as its thermal behavior. (C) 2017 Elsevier Ltd. All rights reserved.
机译：设计用于未来任务的航天器必须满足越来越困难的热需求。特别地，船员车辆必须保持相对恒定的温度，而不管外部条件如何;这是热控制系统（TCS）的作用。可能需要TCS拒绝更高的热量负荷，以及对冷环境的较低热负荷，需要高调比率，通常约为12：1。这项工作提出了一种新颖的散热器概念，采用形状记忆合金（SMA）来几何上重新配置散热器，使得空间勘探车辆的更轻的TCS。热驱动的变形效果允许对空间和主要表面发射率的散热器视图的被动控制。变形散热器的热建模预测了12：1至35：1的调节比，与TCS配置的其他方面无关。系统级质量分析表明，通过启用单环架构，该设计可以将TCS质量降低约25％。两个台式原型提供散热器的操作原则的概念证明。另外，首次开发了一种分析框架，其能够模拟散热器中存在的独特和高度非线性的热机械耦合。该框架提供了散热器中应力的高保真导致以及其热行为。 （c）2017 Elsevier Ltd.保留所有权利。

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