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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Numerical simulation of oxy- acetylene testing procedure of ablative materials for re-entry Space vehicles
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Numerical simulation of oxy- acetylene testing procedure of ablative materials for re-entry Space vehicles

机译:再入航天器烧蚀材料氧乙炔测试程序的数值模拟

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摘要

A testing apparatus for flame exposure of ablative, high thermal flux-resistant materials has been designed and manufactured according to the ASTM E 285-80 standard. The test is useful for the selection of thermal protection systems (TPS) working as ablators and for the evaluation of their shielding performance. In order to support the material/component design and to offer new and differentiated tools for the screening phase of TPS materials, a CFD (computational fluid-dynamics) model of the burning test was developed. The model simulates the combustion of an oxygen-acetylene mixture occurring in a conventional welding torch, and calculates the heat flux incident on the sample and the related temperature fields. The validation of the model was obtained performing suitable instrumented tests enabling direct measurements of both incident heat flux and temperatures of the front and back surfaces of an ablative sample. Good agreement was found between numerical results and experimental measurements, encouraging the use of simulations for the design of the test environmental conditions.
机译:根据ASTM E 285-80标准,已经设计和制造了用于烧蚀,高热通量材料的火焰暴露的测试设备。该测试对于选择用作烧蚀器的热保护系统(TPS)以及评估其屏蔽性能很有用。为了支持材料/组件设计并为TPS材料的筛选阶段提供新的差异化工具,开发了燃烧测试的CFD(计算流体动力学)模型。该模型模拟了传统焊炬中存在的氧-乙炔混合物的燃烧,并计算了入射到样品上的热通量和相关的温度场。通过执行适当的仪器测试获得模型的验证,该测试能够直接测量入射热通量和烧蚀样品正反面的温度。在数值结果和实验测量之间发现了很好的一致性,这鼓励了将模拟用于测试环境条件的设计。

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  • 作者单位

    Department of Chemical Engineering Materials Environment, University of Rome 'La Sapienza', Rome 1-00184, Italy;

    Department of Chemical Engineering Materials Environment, University of Rome 'La Sapienza', Rome 1-00184, Italy;

    Department of Chemical Engineering Materials Environment, University of Rome 'La Sapienza', Rome 1-00184, Italy;

    Department of Chemical Engineering Materials Environment, University of Rome 'La Sapienza', Rome 1-00184, Italy;

    Department of Chemical Engineering Materials Environment, University of Rome 'La Sapienza', Rome 1-00184, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    computational fluid-dynamics; ablative; thermal protection systems; oxy-acetylene exposure test;

    机译:计算流体力学;烧蚀;热防护系统;氧-乙炔暴露测试;

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