In order to visualize the rarefied flow field in a Φ1m hypersonic low-density wind tunnel, an electric glow discharge technique based on high frequency excited power has been developed. Firstly, finite element simulation analysis has been carried out, and it is concluded that the breakdown voltage can be reduced by using high frequency power supply; then an electric glow discharge apparatus has been fabricated, and the discharge images were compared with simulations; besides, a clear flow field around HB-1 standard model has been observed using this technology; finally, the influence of glow discharge on the flow field, as well as the differences between direct current and high frequency electric glow discharges is discussed at the end of this paper.

中文翻译：

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高频交流电辉光放电可视化技术及在大直径高超声速低密度风洞中的应用

为了可视化Φ1m高超声速低密度风洞中的稀薄流场，开发了一种基于高频激发功率的电辉光放电技术。首先进行了有限元仿真分析，得出使用高频电源可以降低击穿电压的结论；然后制作了电辉光放电装置，并将放电图像与模拟进行了比较；此外，使用该技术还观察到了HB-1标准模型周围清晰的流场；最后，本文最后讨论了辉光放电对流场的影响，以及直流电辉光放电与高频电辉光放电的区别。