Dynamics of Radiation from Nanosecond Surface Sliding Discharge in Airflow with Shock Waves


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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 C3Πu states of nitrogen during shock compression of the discharge plasma region.

About the authors

A. Yu. Kuznetsov

Faculty of Physics, Moscow State University

Author for correspondence.
Email: kuznecov.alexander15@gmail.com
Russian Federation, Moscow, 119992

I. V. Mursenkova

Faculty of Physics, Moscow State University

Email: kuznecov.alexander15@gmail.com
Russian Federation, Moscow, 119992

P. Yu. Ulanov

Faculty of Physics, Moscow State University

Email: kuznecov.alexander15@gmail.com
Russian Federation, Moscow, 119992

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