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首页> 外文期刊>Journal of Spacecraft and Rockets >Modeling of Sodium Radiation from Reentry Flows at High Altitudes
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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

A kinetic-based quasi-steady-state model is developed to study sodium radiation intensity for reentry high-altitude flows of the blunt-body Stardust and a slender body. The sodium detected in the high-speed Stardust-reentry flow was from an impurity of the ablative thermal protection material. In this work, the particle-based direct simulation Monte Carlo method is used to obtain flow solutions, and a quasi-steady-state model is used to derive the sodium number-density distributions in the ground and excited electronic states. The sodium radiation intensity is calculated based on the sodium number-density distributions in the excited states and agrees reasonably well with the observation data for the Stardust reentry at 81 km. It was also found that sodium radiation in the slender-body reentry flow will be orders of magnitude less than the value observed for the blunt body.
机译：建立了基于动力学的准稳态模型，以研究钝体星尘和细长物体进入高空气流时的钠辐射强度。高速星尘折返流中检测到的钠来自烧蚀性热保护材料的杂质。在这项工作中，基于粒子的直接模拟蒙特卡洛方法用于获得流动解，并使用准稳态模型来推导基态和激发电子态中的钠数密度分布。钠辐射强度是根据激发态下的钠数密度分布计算的，与81 km处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观察到的值小几个数量级。

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