Characterization of the ignition by repetitive streamer discharges using laser diagnostics

Markus, Detlev; Hallermann, Aljoscha; Paul, Michael; Langer, Tim; Lienesch, Frank

doi:10.1016/j.jlp.2011.10.002

Cited by 4 publications

(1 citation statement)

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“…The densities of other radicals and the rates of chemical reactions are also affected by the high temperature. Therefore, to discuss surface treatments, the temperature near the surface must be Streamer discharges have been used to ignite stoichiometric or near-stoichiometric methane, ethylene, and hydrogenair mixtures using point-plane or wire-cylinder electrodes [14][15][16], where ignition occurs near the pointed electrode tip or wire electrode. The high temperatures near the anode tip observed in the present work are probably one of the reasons for that phenomenon.…”

Section: Temperaturementioning

confidence: 99%

Rapid temperature increase near the anode and cathode in the afterglow of a pulsed positive streamer discharge

Ono¹

2018

J. Phys. D: Appl. Phys.

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The spatiotemporal evolution of the temperature in the afterglow of point-to-plane, pulsed positive streamer discharge was measured near the anode tip and cathode surface using laser-induced predissociation fluorescence of OH radicals. The temperature exhibited a rapid increase and displayed a steep spatial gradient after a discharge pulse. The rate of temperature rise reached 84 K μs −1 at z = 0.15 ± 0.15 mm, where z represents the distance from the anode tip. The temperature rise was much faster than in the middle of the gap; it was only 2.8 K μs −1 at z = 3.6 ± 1.0 mm. The temperature reached 1700 K near the anode tip at t = 10 µs and 1500 K near the cathode surface at t = 30 µs, where t represents the postdischarge time. The spatial gradient reached 1280 K mm −1 near the anode tip at t = 10 µs. The mechanism responsible for the rapid temperature increase was discussed, including rapid heating of the gas in the early postdischarge phase (t 1 µs), and vibration-to-translation energy transfer in the later postdischarge phase (1 < t 100 µs). The high temperatures near the anode tip and cathode surface are particularly important for the ignition of combustible mixtures and for surface treatments, including solid-surface treatments, water treatments, and plasma medicine using pulsed streamer discharges.

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Section: Temperaturementioning

confidence: 99%