TY - JOUR
T1 - Simulation of pulsed positive streamer discharges in air at high temperatures
AU - Komuro, Atsushi
AU - Matsuyuki, Shuto
AU - Ando, Akira
N1 - Funding Information:
The authors would like to thank Dr Ryo Ono for discussions regarding the kinetics of the streamer discharge. This work was partially supported by JSPS KAKENHI Grant Number 15K13606 and a research grant from the Hattori Hokokai and Research Foundation for the Electrotechnology of Chubu.
Publisher Copyright:
© 2018 IOP Publishing Ltd.
PY - 2018/10/9
Y1 - 2018/10/9
N2 - Two-dimensional simulations of an atmospheric-pressure streamer discharge at high gas temperatures were performed in humid air at initial gas temperatures, T 0, in the range 300 K-600 K with the same electrode and applied voltage conditions as those used in Ono and Kamakura (2016 Plasma Sources Sci. Technol. 25 044007). The simulation was validated by comparing its results to experimentally obtained discharge currents, primary streamer velocities, and secondary streamer diameters and lengths. This paper discusses the mechanisms underlying the temperature effects in terms of the behaviour of the charged particles in the primary and secondary streamers. At T 0 = 300 K, the main decay processes in the primary streamer are the electron recombination reactions with cluster ions and electron three-body electron attachment with O2 and H2O, while the main decay process in the secondary streamer is the two-body electron attachment to O2. Although, at T 0 = 600 K, the main decay processes in both streamers are still recombination and two- and three-body electron attachment reactions, the rates of these reactions decrease owing to the increase in the gas temperature, which leads to the increased conductivity of streamer discharge channels at high gas temperatures.
AB - Two-dimensional simulations of an atmospheric-pressure streamer discharge at high gas temperatures were performed in humid air at initial gas temperatures, T 0, in the range 300 K-600 K with the same electrode and applied voltage conditions as those used in Ono and Kamakura (2016 Plasma Sources Sci. Technol. 25 044007). The simulation was validated by comparing its results to experimentally obtained discharge currents, primary streamer velocities, and secondary streamer diameters and lengths. This paper discusses the mechanisms underlying the temperature effects in terms of the behaviour of the charged particles in the primary and secondary streamers. At T 0 = 300 K, the main decay processes in the primary streamer are the electron recombination reactions with cluster ions and electron three-body electron attachment with O2 and H2O, while the main decay process in the secondary streamer is the two-body electron attachment to O2. Although, at T 0 = 600 K, the main decay processes in both streamers are still recombination and two- and three-body electron attachment reactions, the rates of these reactions decrease owing to the increase in the gas temperature, which leads to the increased conductivity of streamer discharge channels at high gas temperatures.
KW - chemical reaction
KW - numerical simulation
KW - streamer discharge
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U2 - 10.1088/1361-6595/aadf5c
DO - 10.1088/1361-6595/aadf5c
M3 - Article
AN - SCOPUS:85056253879
VL - 27
JO - Plasma Sources Science and Technology
JF - Plasma Sources Science and Technology
SN - 0963-0252
IS - 10
M1 - 105001
ER -