Abstract

Spatio-temporal distributions of radiation from pulsed sliding surface discharge of ~300-ns duration in quiescent air at pressures within 2–200 Torr and in the presence of shock waves in supersonic flow with Mach numbers M = 2.8–3.3 have been experimentally studied. The dynamics of radiation from discharge was analyzed based on processing of the streak images and nine-frame images of discharge glow intensity, emission spectra, and discharge current kinetics. It is established that variation of the radiation intensity from discharge interacting with shock waves is correlated with a model temporal dependence of the population of C³Π_u states of nitrogen during shock compression of the discharge plasma region.

中文翻译：

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冲击波对气流中纳秒表面滑动放电的辐射动力学

摘要

已通过实验研究了静态空气中脉冲滑动表面放电（持续时间约300 ns）在2–200 Torr内的压力下以及在马赫数M = 2.8–3.3的超音速流中存在冲击波的情况下，辐射的时空分布。基于对放电辉光强度，发射光谱和放电电流动力学的条纹图像和九帧图像的处理，分析了来自放电的辐射动力学。已经确定，从排出用冲击波相互作用的辐射强度的变化与人口的模型时间依赖性相关Ç ³ Π _ù放电等离子体区域的冲击压缩过程中指出的氮。