Abstract
The characteristics of a distributed sliding surface discharge with a duration of ∼300 ns (plasma sheet) in a non-uniform supersonic airflow with a vortex zone behind a thin wedge have been studied in a shock tube channel. The spatial distribution of the discharge radiation, the spectra of the discharge radiation, and the discharge current are analyzed in the flows behind plane shock waves with Mach numbers 2.4–3.5 (the Mach numbers of flows are 1.16–1.47 and the density is 0.02–0.20 kg/m3). It is shown that in an airflow with a vortex zone, the surface discharge develops as a 1–3-mm-wide channel located in the region of low density behind the wedge. The calculated electron concentration in the discharge channel is an order of magnitude higher than the electron concentration when a discharge is initiated in a homogeneous medium.
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This work was carried out under the support of the Russian Foundation for Basic Research (project no. 19-08-00661).
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Russian Text © The Author(s), 2019, published in Vestnik Moskovskogo Universiteta, Seriya 3: Fizika, Astronomiya, 2019, No. 3, pp. 50–56.
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Mursenkova, I.V., Liao, Y., Ivanov, I.E. et al. The Characteristics of a Nanosecond Surface Sliding Discharge in a Supersonic Airflow Flowing around a Thin Wedge. Moscow Univ. Phys. 74, 269–276 (2019). https://doi.org/10.3103/S0027134919030093
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DOI: https://doi.org/10.3103/S0027134919030093