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Radiative Transfer in a Low-Density Ablative Material Under Arcjet Flow Conditions

机译:低密度烧蚀材料在Arcjet流动条件下的辐射传递

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摘要

Highly porous carbon-based materials, referred to as 120, 150, and 270 kg/m(3) materials hereafter, are heated in nitrogen arcjet conditions; and their respective thermal responses are analyzed both experimentally and numerically. Experiments are conducted in a 1 MW constrictor-type arcjet wind tunnel. A coupling method is used to account for the heating processes between the arcjet flow and material thermal responses. Modeling of radiative transfer in each of the test materials is done using effective radiative conductivity and evaluated using their respective optical radiative extinction coefficients. These extinction coefficients are evaluated from ray tracing calculations using X-ray computed tomography models for each material. A comparison of the results suggests that acceptable agreement between calculated and measured in-depth temperature distributions is possible with the inclusion of radiative heat transfer in the calculations.
机译:高度多孔的碳基材料(以下称为120、150和270 kg / m(3)材料)在氮气电弧喷射条件下加热;并通过实验和数值分析了它们各自的热响应。实验是在1 MW压缩器型电弧喷射风洞中进行的。耦合方法用于解决电弧喷射流和材料热响应之间的加热过程。使用有效辐射传导率对每种测试材料中的辐射传递进行建模,并使用它们各自的光学辐射消光系数进行评估。这些消光系数是使用每种材料的X射线计算机断层摄影模型通过射线追踪计算评估得出的。结果的比较表明,在计算中包括辐射传热的情况下,在计算的和测量的深度温度分布之间可以达成可接受的一致性。

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  • 来源
    《Journal of Thermophysics and Heat Transfer》 |2020年第1期|181-192|共12页
  • 作者单位

    Tottori Univ Dept Mech & Aerosp Engn Tottori 6808552 Japan;

    Tottori Univ Dept Mech & Aerosp Engn Tottori 6808552 Japan|AIAA Reston VA USA;

    Japan Aerosp Explorat Agcy Jindaiji Higashi Machi 7-44-1 Chofu Tokyo 1810012 Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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