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Modeling of Streamer Dynamics in Atmospheric‐Pressure Air Plasma Jets
Author(s) -
Naidis George V.
Publication year - 2017
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201600127
Subject(s) - jet (fluid) , plasma , atmospheric pressure , atmospheric pressure plasma , helium , mixing (physics) , atomic physics , mechanics , materials science , chemistry , physics , meteorology , nuclear physics , quantum mechanics
Results of simulation of streamers propagating along atmospheric‐pressure air plasma jets formed by pulsed discharges in thin dielectric tubes are presented. The specific feature of these jets is substantial gas heating by the discharges. The hot gas, emerging from the tube, is cooled at mixing with surrounding air. The streamers are guided along the jet axis, the channel with reduced gas density. Spatial profiles of various plasma parameters inside the jet are calculated. The densities of produced oxygen and nitrogen atoms near the jet axis are one‐two orders larger, while the widths of radial profiles of these species are several times smaller than those in typical helium plasma jets.