This article is cited in 1 paper

Dynamics of radiation from nanosecond surface sliding discharge in airflow with shock waves

A. Yu. Kuznetsov, I. V. Mursenkova, P. Yu. Ulanov

Lomonosov Moscow State University

Abstract: Spatio-temporal distributions of radiation from pulsed sliding surface discharge of $\sim$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 $C^3\Pi_u$ states of nitrogen during shock compression of the discharge plasma region.

Keywords: surface sliding discharge, radiation dynamics, decay time, electron-optical camera, plane shock wave.

Received: 13.06.2019
Revised: 25.06.2019
Accepted: 23.09.2019

DOI: 10.21883/PJTF.2019.24.48804.17924

 English version: Technical Physics Letters, 2019, 45:12, 1266–1269

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