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首页> 外文期刊>Journal of Spacecraft and Rockets >High-Temperature Spectrometer for Thermal Protection System Radiation Measurements
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High-Temperature Spectrometer for Thermal Protection System Radiation Measurements

机译：用于热保护系统辐射测量的高温光谱仪

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摘要

To better characterize the response of thermal protection system materials to predicted near-infrared shock layer radiation, a new experimental system was developed to extend the measurement range of radiation transport parameters to high-temperature environments and relatively high-radiation fluxes. A portable research-grade spectrometer was coupled with fiber optics in order to operate in a variety of harsh operating environments. Experimental results are presented from tests performed at the solar tower, which provided broadband nonpulsed visible and infrared radiation at relatively high-flux levels. Data from three low-density porous refractory fibrous materials are presented, including two shuttle tile materials (fibrous refractory composite insulation and Lockheed International) and one carbon fiber material. The results showed that thin 1 and 2 mm specimens of the ceramic tile materials acted as robust high-temperature gray filters in the near infrared, whereas thicker tile specimens (and 1 mm and thicker porous carbon fiber matrix samples tested) absorbed the incident radiation strongly and exhibited only thermal radiation spectral profiles.
机译：为了更好地表征热保护系统材料对预测的近红外冲击层辐射的响应，开发了一种新的实验系统，以将辐射传输参数的测量范围扩展到高温环境和相对较高的辐射通量。便携式研究级光谱仪与光纤配合使用，可以在各种恶劣的操作环境中运行。实验结果来自在太阳能塔上进行的测试，该测试提供了相对较高通量水平的宽带无脉冲可见光和红外辐射。给出了来自三种低密度多孔耐火纤维材料的数据，包括两种穿梭瓦材料（纤维耐火复合绝缘材料和洛克希德国际公司）和一种碳纤维材料。结果显示，薄的1和2毫米的瓷砖材料样本在近红外中充当坚固的高温灰色滤光片，而较厚的瓷砖样本（以及测试的1毫米和较厚的多孔碳纤维基质样本）则强烈吸收入射辐射并且仅表现出热辐射光谱图。

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