Similarity laws for cathode-directed streamers in gaps with an inhomogeneous field at elevated air pressures

Bolotov, O. V.; Golota, V.I.; Kadolin, B.; Karas, V. I.; Ostroushko, V. N.; Zavada, L.M.; Shulika, A. Yu.

doi:10.1134/s1063780x10110097

Cited by 6 publications

(7 citation statements)

References 42 publications

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“…Therefore, the similarity law does not hold, but a law similar to the similarity law holds for some parameters. Figure 5 shows that Q is determined by the product VT or by E/n almost independent of T. Generally, the similarity law holds for the product Qn [8,14]. However, in the present experiment with the fixed-gap condition, it appears to hold for Q but not for Qn.…”

Section: Transferred Charge and Discharge Energycontrasting

confidence: 47%

“…The similarity law holds for the streamer velocity as well [14]. Figure 9 shows the average velocity of streamer propagation as a function of V 1 T for constant temperature (T = 293 K) and constant voltage ( = V 12 c kV), where V 1 represents the average voltage during the streamer propagation.…”

Section: Shape Velocity and Emission Intensity Of The Streamermentioning

confidence: 88%

“…This is called the similarity law. The similarity law of the streamer discharge has been examined at room temper ature with varying pressures [8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Pulsed positive streamer discharges in air at high temperatures

Ono¹,

Kamakura²

2016

Plasma Sources Sci. Technol.

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Atmospheric-pressure air pulsed positive streamer discharges are generated in a 13 mm point-plane gap in the temperature range of 293 K-1136 K, and the effect of temperature on the streamer discharges is studied. When the temperature is increased, the product of applied voltage and temperature VT proportional to the reduced electric field can be used as a primary parameter that determines some discharge parameters regardless of temperature. For a given VT, the transferred charge per pulse, streamer diameter, product of discharge energy and temperature, and length of secondary streamer are almost constant regardless of T, whereas the streamer velocity decreases with increasing T and the decay rate of the discharge current is proportional to 1/T. The N 2 (C) emission intensity is approximately determined by the discharge energy independent of T. These results are useful to predict the streamer discharge and its reactive species production when the ambient temperature is increased.

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Section: Transferred Charge and Discharge Energycontrasting

confidence: 47%

Section: Shape Velocity and Emission Intensity Of The Streamermentioning

confidence: 88%

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Pulsed positive streamer discharges in air at high temperatures

Ono¹,

Kamakura²

2016

Plasma Sources Sci. Technol.

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“…, where t is the time constant. Under the similarity law, Q is a conserved quantity [8,11,37]. Figure 9 shows a comparison of the experimentally derived and simulated values of t as a function of T 0 .…”

Section: Comparison With Experimental Resultsmentioning

confidence: 99%

Simulation of pulsed positive streamer discharges in air at high temperatures

Komuro

Matsuyuki

Andõ

2018

Plasma Sources Sci. Technol.

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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 O 2 and H 2 O, while the main decay process in the secondary streamer is the two-body electron attachment to O 2 . 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.

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“…From the experimental data, it follows that in positive corona the energy expense on one ozone molecule forming is less than in negative corona. Cathode directed streamer propagation is widely studied [1] and its study is continuing [2][3][4]. In experiments, for the streamers overlapping the discharge gap, the total current time dependence may have two maxima [4].…”

Section: Introductionmentioning

confidence: 99%

Two Peaks of Total Current in Streamer Propagation

Bolotov¹,

Kadolin²,

Mankovskyi³

et al. 2020

Problems of Atomic Science and Technology

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The numerical simulations of the cathode directed streamer propagation in the discharge gap, with the streamer going out to cathode, are carried out. The processes are found, which take place near anode and contribute to the formation of the first of two maxima of total current time dependence. The factors are considered, which determine the propagation of the ionization process at the final stage, when the streamer approaches the cathode, and the ionization wave is propagating along the cathode surface.

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Similarity laws for cathode-directed streamers in gaps with an inhomogeneous field at elevated air pressures

Cited by 6 publications

References 42 publications

Pulsed positive streamer discharges in air at high temperatures

Pulsed positive streamer discharges in air at high temperatures

Simulation of pulsed positive streamer discharges in air at high temperatures

Two Peaks of Total Current in Streamer Propagation

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