中国空间科学技术（中英文）2025，Vol.45Issue(1)：81-87,7.DOI:10.16708/j.cnki.1000-758X.2025.0008
基于近场热辐射的可变发射率空间辐射器技术
Variable-emittance space radiator based on near-field thermal radiation
摘要
Abstract
Aiming at the problem that the radiator of manned space thermal control system is designed according to the maximum heat load and is difficult to adapt to the low temperature condition,a technology of variable-emittance radiator based on near-field thermal radiation regulation is proposed.An effective emittance model of a radiator involved in near-field thermal radiation is developed,and the dependences of near-field radiative heat flux and effective emittance on voltage are solved by using fluctuational electrodynamics and semiconductor carrier transport theory.The coupled heat transfer model of variable-emittance radiator and single-phase fluid loop is established,and the performance of the scheme for temperature control of working medium is simulated and analyzed.The results show that the emittance can be varied up to 0.62 in the voltage range of-5 V to 20 V,and the lowest emittance can be reduced to less than 0.2 under heat preservation condition.Used in conjunction with single-phase fluid loop,the perfluorotriethylamine(PFTA)working medium can be maintained in the normal operating temperature range(-100-50℃)under various internal thermal loads and external thermal environments by tuning the control voltage,thus improving the adaptability of the thermal control system.Although it's currently difficult and costly to fabricate,with the development of nano-processing technology,the technology has the potential to serve space missions with more complex and variable thermal environments,such as manned deep space exploration.关键词
航天器热控制/辐射器/可变发射率/单相流体回路/电调控近场热辐射Key words
spacecraft thermal control/radiator/variable emittance/single-phase fluid loop/electrically tunable near-field thermal radiation分类
航空航天引用本文复制引用
徐德宇,汪国云,孟繁孔,赵军明..基于近场热辐射的可变发射率空间辐射器技术[J].中国空间科学技术（中英文）,2025,45(1):81-87,7.基金项目
国家自然科学基金(51976045) （51976045）
