Formation of Shock-Wave Flow during Nanosecond Discharge Localization in Unsteady Flow in a Channel with Obstacles

D. I. Dolbnya; Долбня Д. И.; I. A. Znamenskaya; Знаменская И. А.; A. E. Lutsky; Луцкий А. Е.; N. N. Sysoev; Сысоев Н. Н.

doi:10.31857/S0568528122600308

Formation of Shock-Wave Flow during Nanosecond Discharge Localization in Unsteady Flow in a Channel with Obstacles

Authors: Dolbnya D.I.¹, Znamenskaya I.A.¹, Lutsky A.E.², Sysoev N.N.¹
Affiliations:
1. Physics Department of Moscow State University
2. Keldysh Applied Mathematics Institute of the Russian Academy of Sciences
Issue: No 1 (2023)
Pages: 144-150
Section: Articles
URL: https://journals.rcsi.science/1024-7084/article/view/135059
DOI: https://doi.org/10.31857/S0568528122600308
EDN: https://elibrary.ru/AFAUGH
ID: 135059

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Abstract
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Abstract

The results of studies of the effect of volume and surface pulse discharges on high-speed gas flow in a rectangular shock-tube channel with a change in the profile (obstacle on the lower wall) are given. A single nanosecond surface discharge or a discharge with preionization induced by the plasma electrodes (combined discharge) was initiated in flow downstream of the shock wave with the Mach numbers Ms = 3.2–3.4. The obstacle determines the distribution of the parameters of flow past the obstacle and the pulse discharge plasma redistribution. The density fields of gas dynamic flow under the experimental conditions are obtained and compared with the discharge plasma distribution. It is shown that the shock-wave effect of the discharge on flow behind the obstacle continued from 25 to 70 μs.

Keywords

shock wave, discharge self-localization, plasma electrodes, separation flow, volume discharge, surface discharge, rapid heating effect

References

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