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Control of weakly ionized flow around a reentry vehicle and aerodynamic heating by means of electromagnetic effect

利用电磁效应控制再入飞行器周围的弱电离流和气动加热

基本信息

批准号：
15206093
负责人：
ABE Takashi
金额：
$ 28.29万
依托单位：
Japan Aerospace Exploration Agency
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2005
项目状态：
已结题

项目摘要

The biggest challenge for a reentry vehicle from space is how to control the high temperature gas flow around the vehicle to prevent its heating-up. Traditionally, the control was passively managed by means of he heat protection system. On the contrary, we consider, in the present study, the active control by using the electro-magnetic effect and investigate its feasibility both experimentally and numerically. In the experiment, the flow behavior around the magnetized body set in the arc-jet wind tunnel was investigated. For this purpose, the translational temperature spatial distribution was measured by means of the absorption spectroscopy for which a new method was developed, which enables us to apply the absorption spectroscopy even in a strong magnetic field environment. The result shows the shock layer enhancement due to the magnetic field application, as the theory predicted. The present result gives a sound basis to develop the numerical analysis of the present phenomenon, and gives a significant contribution for the relevant investigation.The numerical simulation was developed for the present electromagnetic effect. The simulation result which shows a reasonable agreement with the present experimental result. It was found though the numerical simulation that the vehicle surface has a significant effect on the elelectromagnetic effect, which was experimentally confirmed. It is also confirmed that the electomagnetic effect is effective in a flight condition. In addition, the feasibility of the flight demonstration of the present method was revealed.The present study clarified the basic phenomenon of the electromagenetic effect and its feasibility of the application to the reentry vehicle.

从太空返回飞行器面临的最大挑战是如何控制飞行器周围的高温气流，以防止其升温。传统上，通过热保护系统被动地管理控制。相反，我们认为，在本研究中，通过使用电磁效应的主动控制，并探讨其可行性的实验和数值模拟。在电弧射流风洞中对磁化体的绕流特性进行了实验研究。为此，平移温度的空间分布测量的吸收光谱的装置，其中开发了一种新的方法，这使我们能够应用吸收光谱，即使在强磁场环境中。结果表明，磁场的作用使激波层增强，与理论预测的一致。本文的结果为进一步开展数值分析提供了良好的基础，为相关研究提供了重要的参考。仿真结果与实验结果吻合较好.通过数值模拟发现，车辆表面对电磁效应有显著的影响，这一点得到了实验的证实。还证实了电磁效应在飞行条件下是有效的。此外，还揭示了该方法用于飞行演示的可行性，阐明了电磁效应的基本现象及其在再入飞行器上应用的可行性。