Sheng Chunchen, Hu Peng, Cheng Xiaofang
Department of Thermal Science and Energy Engineering, University of Science and Technology of China, Hefei 230027, China.
Rev Sci Instrum. 2016 Jun;87(6):064902. doi: 10.1063/1.4953339.
Radiative heat flux measurement is significantly important for a spacecraft thermal test. To satisfy the requirements of both high accuracy and fast response, a novel transient radiative heat flux meter was developed. Its thermal receiver consists of a central thermal receiver and two thermal guarded annular plates, which ensure the temperature distribution of the central thermal receiver to be uniform enough for reasonably applying lumped heat capacity method in a transient radiative heat flux measurement. This novel transient radiative heat flux meter design can also take accurate measurements regardless of spacecraft surface temperature and incident radiation spectrum. The measurement principle was elaborated and the coefficients were calibrated. Experimental results from testing a blackbody furnace and an Xenon lamp show that this novel transient radiative heat flux meter can be used to measure transient radiative heat flux up to 1400 W/m(2) with high accuracy and the response time of less than 10 s.
辐射热流测量对于航天器热试验具有极其重要的意义。为满足高精度和快速响应的要求，研制了一种新型瞬态辐射热流计。其热接收器由一个中央热接收器和两个热屏蔽环形板组成，这确保了中央热接收器的温度分布足够均匀，以便在瞬态辐射热流测量中合理应用集总热容法。这种新型瞬态辐射热流计设计还能在不考虑航天器表面温度和入射辐射光谱的情况下进行精确测量。阐述了测量原理并对系数进行了校准。对黑体炉和氙灯测试的实验结果表明，这种新型瞬态辐射热流计可用于高精度测量高达1400 W/m²的瞬态辐射热流，响应时间小于10 s。
