摘要
针对空间环境中热控涂层性能退化的问题,提出一种模拟空间环境中利用测热法实现热控涂层太阳吸收率原位测试的辐射计设计方案.结合模拟空间环境的测试要求,进行辐射计的原理设计与理论研究;对辐射计进行结构热分析,建立辐射计测试过程中各项换热的计算式,从而得到辐射计的瞬态计算模型.恒温测试环境下利用辐射计对SR107热控涂层进行了测试.实验结果表明:辐射计测试的SR107热控涂层太阳吸收率值与该涂层的标定值之间的相对误差在2%以内,测试的不确定度为6.3%,实验结果验证了该测试方法的有效性.
To solve the problem of thermal control coatings degradation in space environment,it is necessary to study coatings degradation law in simulated space environment,thus a radiometer design based on calorimetry was proposed for in situ measurement of thermal control coatings solar absorptance.The radiometer structure was designed according to the requirement of in situ measurement.By conducting thermal analysis on radiometer,the heat transfer equations were built and a calculation model based on transient thermal equilibrium was established by energy conservation principle.An SR107 thermal control coating was tested in isoperibol.The experiment result shows a within 2% relative error between the solar absorptance of SR107 and the coating calibration value,with a 6.3% measurement uncertainty.The result validates the effectiveness of the experiment.
出处
《北京航空航天大学学报》
EI
CAS
CSCD
北大核心
2011年第12期1579-1584,共6页
Journal of Beijing University of Aeronautics and Astronautics
基金
长江学者和创新团队发展计划资助项目(IRT0705)
关键词
热控涂层
辐射计
原位测试
太阳吸收率
thermal control coating
radiometer
in situ measurement
solar absorptance
