Dynamics of Radiation from Nanosecond Surface Sliding Discharge in Airflow with Shock Waves
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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 C3Πu states of nitrogen during shock compression of the discharge plasma region.
Keywords:sliding surface discharge emission dynamics decay time electro-optic camera plane shock wave.
This study was supported in part by the Russian Foundation for Basic Research (project no. 19-08-00661) and the “Program of Development of Moscow State University to 2020.”
CONFLICT OF INTEREST
The authors declare that they have no conflict of interest.
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