Open AccessInvestigation on nanosecond surface sliding discharge in a supersonic airflow with oblique shock wave
Author(s) -
И. В. Мурсенкова,
И. Э. Иванов,
P. Yu. Ulanov,
Yu Liao,
A. A. Sazonov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1698/1/012001
Subject(s) - oblique shock , shock wave , mach number , shock tube , materials science , shock (circulatory) , mechanics , supersonic speed , nanosecond , boundary layer , plasma actuator , shock diamond , optics , dielectric barrier discharge , physics , laser , medicine , optoelectronics , dielectric
We report investigations of the nanosecond surface sliding discharge in supersonic airflows with the oblique shock wave at Mach numbers of the flow 1.30-1.60 in shock tube. We show that the surface sliding discharge developed in flows as a single channel located near a zone of interaction of the oblique shock with the boundary layer on the wall of the channel. A pulse voltage of 25 kV powered the discharge; the electric current was of 1 kA. The electron concentration in the localized discharge channel was (0.7-1.4).1015 cm -3 and the electron energy was of 1.8-2.2 eV from the analysis the emission spectra. High-speed flow field shadowgraphy after the surface sliding discharge showed that the localized discharge channel generates a strong shock wave, leading to restructuring the shock-wave structure of the flow within ∼100 μs and subsequent relaxation to a stationary configuration.