Electrical and mechanical characteristics of nanosecond pulsed sliding dielectric barrier discharges with different electrode gaps

Bayoda, Kossi D.; Bénard, Nicolas; Moreau, E.

doi:10.1088/1742-6596/646/1/012054

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…Therefore, over a few years, a new electrode geometry based on three electrodes was perfected, first for the case of AC-DBD [35][36][37][38] and more recently for the case of NS-DBD. For the latter case, gas ionization is realized as usual with a pulsed voltage while the drift of the ionized species is promoted by a DC negative voltage applied to a second air-exposed electrode; this is the nanosecond sliding discharge [25,[39][40][41]. However, this type of sliding discharge can also be produced without DC voltage if a sufficient pulsed voltage is applied [42,43].…”

Section: Introductionmentioning

confidence: 99%

Streamer propagation and pressure waves produced by a nanosecond pulsed surface sliding discharge: effect of the high-voltage electrode shape

Moreau¹,

Bayoda²,

Bénard³

2020

J. Phys. D: Appl. Phys.

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This paper aims at better understanding nanosecond sliding discharges based on a three-electrode geometry and at studying the effect of the shape of the pulsed high-voltage electrode on their electrical, optical and mechanical properties. Three different electrode shapes are considered: a typical planar electrode with a straight edge, a planar electrode with a sawtooth edge, and a wire electrode. First, we verified that the sliding discharge starts to appear when the potential difference between both air-exposed electrodes exceeds about 25 kV, corresponding to a mean electric strength (potential difference divided by the gap) a little bit higher than 6 kV cm−1, but this value differs slightly depending on the shape of the electrode. Secondly, we highlighted that the current with the wire-based discharge is slightly higher compared to the two others because the streamers are more numerous and they are more uniformly distributed along the wire. Moreover, whatever the electrode shape, intensified charge-coupled device visualizations showed that many streamers initiate from the pulsed high-voltage electrode edge and propagate on the dielectric surface toward the DC voltage electrode at a mean velocity of about 1 mm ns−1. However, the streamer trajectory depends strongly on the electrode shape. Visualizations of the pressure waves induced by the different plasma actuators have been realized with a shadowgraph system. In the presence of a sliding discharge, every streamer is at the origin of three different pressure waves. The first hemispherical pressure wave results from streamer ignition at the edge of the pulsed high-voltage electrode, the head of the streamer acting as a point heat source. The second hemispherical pressure wave is due to the corona-type discharge that ignites from the negative DC high-voltage electrode when the streamer head gets closer. Finally, the third wave is a semi-cylindrical wave as each streamer acts as a line source of heat. To conclude, pressure measurements highlighted that the peak value of the pressure is nearly constant along the spanwise direction of the wire electrode as it presents high fluctuations with the sawtooth electrode, the maximum pressure being measured above the tips, where streamers are localized.

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Section: Introductionmentioning

confidence: 99%

Streamer propagation and pressure waves produced by a nanosecond pulsed surface sliding discharge: effect of the high-voltage electrode shape

Moreau¹,

Bayoda²,

Bénard³

2020

J. Phys. D: Appl. Phys.

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“…In recent years, the investigation of the diagnostic method of discharge modes has attracted much attention. So far, various methods have been applied to distinguish the discharge modes, such as Lissajous figures and voltage-current waveform [26,27], ICCD (intensified charge-coupled device) high-speed imaging [28,29], optical emission spectrum [30][31][32], and numerical simulation [33,34]. Some of them are about time characteristics, and some are about the spatial characteristics.…”

Section: Introductionmentioning

confidence: 99%

Classification and uniformity optimization of mesh-plate DBD and its application in polypropylene modification

Yan

Lü

Luo

et al. 2019

Plasma Sci. Technol.

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The classification of spatial characteristics and discharge modes of dielectric barrier discharge (DBD) are gaining increasing attention in industrial applications, especially in the field of surface treatment of materials. In this work, gray level histogram (GLH) and Fourier energy spectrum based on the digital image processing technology are applied to investigate the spatial structure and discharge mode of mesh-plate DBD. The coefficient of variation (CV ) is calculated to describe the uniformity of the discharge. The results show that the discharge mode of mesh-plate DBD changes from periodic discharge to filamentary discharge when the applied voltage increases from 11-15 kV. Moreover, a more regular spatial structure is obtained under lower applied voltages during the discharge process. It is also found that the apertures of mesh electrodes which are below 1 mm have smaller values of CV compared to plate electrodes, indicating more uniform discharge. Finally, polypropylene is treated by mesh-plate DBD for surface modification. The hydrophilicity is significantly improved as the water contact angle decreased by 64°, and the dyeing depth is also enhanced.

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“…Разряды наносекундной длительности, широко иссле-дуемые в последнее время, используются, в частно-сти, для воздействия на газодинамические течения [1][2][3][4]. Особенностью таких разрядов является изменение состояния газа за короткое время протекания тока разряда и его быстрый нагрев в результате импульсного энерговклада.…”

Section: Introductionunclassified

“…Длительность свечения разряда в неподвижном воздухе зависела от напряже-ния на разрядном промежутке и давления воздуха и не превышала 400 ns; при взаимодействии с плоской ударной волной длительность излучения в области фрон-та могла превышать 2 µs. Скользящий поверхностный разряд (плазменный лист), состоящий из параллель-ных скользящих по поверхности диэлектрика каналов, образует плазменный слой толщиной ∼ 0.5 mm около поверхности диэлектрика [2][3][4]. Он позволяет эффектив-но воздействовать на пристеночные газодинамические течения, так как развивается в тонком слое газа и обеспечивает значительный удельный энерговклад.…”

Section: Introductionunclassified

Исследование Плазмодинамических Процессов Наносекундного Диапазона При Формировании Ударных Волн От Импульсных Разрядов

Doroshchenko¹,

Знаменская²,

Кузнецов³

et al. 2018

Журнал Технической Физики

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Electrical and mechanical characteristics of nanosecond pulsed sliding dielectric barrier discharges with different electrode gaps

Cited by 4 publications

References 7 publications

Streamer propagation and pressure waves produced by a nanosecond pulsed surface sliding discharge: effect of the high-voltage electrode shape

Streamer propagation and pressure waves produced by a nanosecond pulsed surface sliding discharge: effect of the high-voltage electrode shape

Classification and uniformity optimization of mesh-plate DBD and its application in polypropylene modification

Исследование Плазмодинамических Процессов Наносекундного Диапазона При Формировании Ударных Волн От Импульсных Разрядов

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