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Abstrakt: The kinetic model simulating plasma chemistry induced by Transient Spark (TS) discharge in
air is presented in this work. The TS is a DC-driven self-pulsing discharge of streamer-to-spark
transition type. Presented kinetic model defines the temporal evolution of reduced electric field
strength E/N , gas temperature and density of neutrals N during the evolution of TS discharge, so
that calculated electron density is in agreement with experimental results. We studied the mechanism
of the streamer-to-spark transition and breakdown in the TS using this model. We assume that the
breakdown mechanism in TS is based on the gas density decrease and can be summarized as follows:
heating of the channel → increase of the pressure → hydrodynamic expansion → decrease of N in
the core of the channel → increase of E/N → acceleration of ionization processes. However, this
mechanism is influenced by species accumulated due to previous TS pulses at higher TS repetition
frequencies. Sensitivity analysis focused on major electron loss and production processes indicates
an important role of the amount of O2 dissociated by the previous pulses. Lower density of O2 means
lower rate of electron attachment, while accumulated atomic oxygen atoms lead to acceleration of
electron detachment processes.
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Citácie: | 1.) | Ulejczyk, B et al. 2023 Effect of Water Content on Ethanol Steam Reforming in the Nonthermal Plasma; ACS OMEGA 8:10119-10125; 10.1021/acsomega.2c07431
(2023)
------------- | | 2.) | Zhou, X.-F., Xiang, H.-F., Yang, M.-H., Geng, W.-Q., Liu, K., 2023. Temporal evolution characteristics of the excited species in a pulsed needle-water discharge: effect of voltage and frequency. J. Phys. D: Appl. Phys. 56, 455202. https://doi.org/10.1088/1361-6463/acec81
(2023)
------------- | | 3.) | Ulejczyk, B et al. 2022 Efficient Plasma Technology for the Production of Green Hydrogen from Ethanol and Water, ENERGIES 15:2777, 10.3390/en15082777
(2022)
------------- | | 4.) | Energy Deposition for High-Speed Flow Control, Doyle D. Knight, Cambridge University Press 2019, Online ISBN 9781316389331, DOI: 10.1017/9781316389331
(2019)
------------- | | 5.) | L Wang, S. Chen, F. Wang (2019) Kinetic Modelling of Atmospheric Pressure Corona Discharges in Humid Air, Plasma Chemistry and Plasma Processing XXX, DOI: 10.1007/s11090-019-10006-9
(2019)
------------- | | 6.) | P. Thana et al 2019 A compact pulse-modulation cold air plasma jet for the inactivation ofchronic wound bacteria: development and characterization, Heliyon 5 (2019) e02455
(2019)
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