Postflight Analysis of Inflatable Reentry and Descent Technology Blackout During Earth Reentry
Postflight Analysis of Inflatable Reentry and Descent Technology Blackout During Earth Reentry
复制标题
地球再入期间充气再入和下降技术停电的飞行后分析
DOI：
10.2514/1.41480
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发表时间：
2009
影响因子：
1.6
通讯作者：
David Evans
中科院分区：
文献类型：
--
作者：
P. Reynier;David Evans
2006年进行的充气式再入和下降技术飞行不是名义上的。这次飞行的特点是停电时间比预期的要短。在这里，我们应用两种方法，可用于执行飞行后分析。第一种方法基于工程方法，已用于飞行前分析。第二个涉及到计算流体动力学和电磁求解器之间的耦合计算。飞行后分析的主要目的是使用飞行数据验证这种先进的方法，并评估工程方法的有效性。数值结果表明，工程方法高估了停电持续时间，由于事实上，这种方法是基于一个严重的开/关开关。耦合的方法导致低估的停电期间。一些不确定性，如烧蚀材料对电离的影响，可以解释这种差异。分析建立了耦合方法的有效性，但其准确性在很大程度上取决于用于计算的建模。
The Inflatable Reentry and Descent Technology flight performed in 2006 was not nominal. The flight was characterized by a blackout period shorter than expected. Here, we apply two methods that can be used to perform postflight analysis. The first, based on an engineering approach, has already been used for the preflight analysis. The second involves coupled calculations between a computational fluid dynamics and an electromagnetic solver. The main objective of this postflight analysis is to validate this advanced approach using flight data and to assess the validity of the engineering method. Numerical results show that the engineering method overpredicts the blackout duration due to the fact that this method is based on a severe on/off switch. The coupled approach leads to an underestimation of the blackout period. Several uncertainties, such as the influence of ablativematerial on ionization, could explain this discrepancy. Analysis establishes the validity of the coupled approach, but its accuracy depends strongly on the modeling used for the calculations.