ISSN 2079-3537      


Scientific Visualization, 2019, volume 11, number 3, pages 54 - 63, DOI: 10.26583/sv.11.3.05

High speed digital recording of plasma-gas dynamic processes in supersonic channel flow

Authors: I.A. Znamenskaya1, I.V. Mursenkova2, I.A. Doroshchenko3

Lomonosov Moscow State University

1 ORCID: 0000-0001-6362-9496,

2 ORCID: 0000-0002-7181-4533,

3 ORCID: 0000-0002-0488-0020,



We discuss the results of the visualization of dynamic processes that occur when a pulsed volume discharge concentrates in front of the shock wave in the rectangular channel. Panoramic visualization of the high-speed processes was carried out with a high temporal resolution - in the nanosecond range - based on high-speed recording of the discharge glow by electron-optical cameras, as well as in the microsecond range - using high-speed shadow imaging. We obtained discharge glow images in optical range during the discharge electric current flow and in the afterglow mode. The electron-optical camera exposure was 100 ns. The flow pattern after pulse ionization of the plane shock wave corresponds to the 1D Riemann problem solution. The flow was visualized by the high-speed shadowgraphy with frame rates from 100 000 to 525 000. We made digital processing and analysis of the obtained frames. We compared data obtained with different cameras in nanosecond and microsecond time range and plotted space-time curves of the discontinuities movement. 1D CFD profiles were compared with the experimental data.


Keywords: flow visualization, panoramic imaging techniques, high-speed shadowgraphy, shock waves, contact discontinuities, combined nanosecond discharge.