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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >A solar radiant heating apparatus for measuring the thermal behavior of silica fiber phenolic composite for thermal protection applications
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A solar radiant heating apparatus for measuring the thermal behavior of silica fiber phenolic composite for thermal protection applications

机译：一种用于热防护应用中测量二氧化硅纤维酚醛复合材料热性能的太阳辐射加热装置

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A solar radiant heat flux experimental apparatus was designed and built with a complete set of instrumentation. The sunlight, which firstly converged by Fresnel lens and then secondly converged by prism, was used as the energy source. The test bench was capable of producing a known high radiant heat flux in a short time and was used to investigate the thermal and ablation behaviors of thermal protection materials designed for space vehicle. The thermocouples were embedded in the test specimen to monitor the time-dependent temperatures. Also, the thickness of the heat affected zone was determined by sectioning the specimen after thermal exposure in millimeter segments. These experimental data are suitable for use in verification of numerical models. A mathematical model for the coupled temperature-diffusion expansion problem of porous materials was proposed. The thermal responses of a silica fiber phenolic composite were predicted and compared with experimental values for the same boundary and initial conditions to assess the accuracy of the model. (C) 2016 Elsevier Ltd. All rights reserved.
机译：设计并建造了一套配有整套仪器的太阳辐射热通量实验装置。首先通过菲涅耳透镜会聚，然后通过棱镜会聚的阳光被用作能源。该试验台能够在短时间内产生已知的高辐射热通量，并用于研究为航天器设计的热防护材料的热和烧蚀性能。将热电偶嵌入试样中以监控随时间变化的温度。同样，热影响区的厚度是通过将暴露于毫米后的样品切片而确定的。这些实验数据适用于数值模型的验证。提出了多孔材料温度-扩散耦合问题的数学模型。预测了二氧化硅纤维酚醛复合材料的热响应，并与相同边界和初始条件下的实验值进行了比较，以评估模型的准确性。 （C）2016 Elsevier Ltd.保留所有权利。

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