火箭发动机排气弹坑的经验标度律
Empirical Scaling Laws of Rocket Exhaust Cratering
摘要：
当航天器在地球表面的风化层上发射或着陆时，需要特别注意火箭排气的成坑效应。如果不控制这些影响，火箭撞击坑可能会损坏航天器或周围的其他硬件。火箭着陆行星表面的陨石坑效应还没有得到很好的理解，特别是对于羽流在真空中膨胀的月球情况。因此，爆炸效应无法用分析理论充分估计。有必要开发基于物理学的模拟工具，以便计算任务所需的参数。在这项工作中，我们测试出的物理学的缩放定律在陨石坑深度的增长率。这将提供开始基于物理的建模所需的物理洞察力。
英文摘要：
When launching or landing a spacecraft on the regolith of a terrestrial surface, special attention needs to be paid to the rocket exhaust cratering effects. If the effects are not controlled, the rocket cratering could damage the spacecraft or other surrounding hardware. The cratering effects of a rocket landing a planet's surface are not understood well, especially for the lunar case with the plume expanding in vacuum. As a result, the blast effects cannot be estimated sufficiently using analytical theories. It is necessary to develop physics-based simulation tools in order to calculate mission-essential parameters. In this work we test out the scaling laws of the physics in regard to growth rate of the crater depth. This will provide the physical insight necessary to begin the physics-based modeling.
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