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Modeling of Sodium Radiation from Reentry Flows at High Altitudes

机译:高空折返流钠辐射的建模

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摘要

Akinetic-based quasi-steady-statemodel is developed to study sodiumradiation intensity for reentry high-altitudenflows of the blunt-body Stardust and a slender body. The sodium detected in the high-speed Stardust-reentry flownwas from an impurity of the ablative thermal protection material. In this work, the particle-based direct simulationnMonte Carlo method is used to obtain flow solutions, and a quasi-steady-state model is used to derive the sodiumnnumber-density distributions in the ground and excited electronic states.The sodiumradiation intensity is calculatednbased on the sodium number-density distributions in the excited states and agrees reasonably well with thenobservation data for the Stardust reentry at 81 km. It was also found that sodium radiation in the slender-bodynreentry flow will be orders of magnitude less than the value observed for the blunt body.
机译:建立了基于运动学的准稳态模型,以研究钝体星尘和细长物体进入高空后的钠辐射强度。高速星尘折返室中检测到的钠是来自烧蚀性热保护材料的杂质。本文采用基于粒子的直接模拟n蒙特卡罗方法获得流解,并使用准稳态模型导出基态和激发电子态中的钠原子数密度分布。激发态的钠数密度分布,与81 km星尘折返的观测数据相当吻合。还发现,细长体折返流中的钠辐射将比钝器体观察到的值小几个数量级。

著录项

  • 来源
    《Journal of Spacecraft and Rockets》 |2010年第5期|p.757-764|共8页
  • 作者单位

    Pennsylvania State University, University Park, Pennsylvania 16802;

  • 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

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