Role of the volume and surface breakdown in a formation of microdischarges in a steady-state DBD

Akishev, Yu. S.; Aponin, G. I.; Balakirev, A. A.; Грушин, М. Е.; Karalnik, Vladimir; Petryakov, A. V.; Трушкин, Н. И.

doi:10.1140/epjd/e2010-10219-7

Cited by 41 publications

(47 citation statements)

References 13 publications

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“…As we know, the discharge remnant (the surface charge and the active species in volume) plays an important role on the subsequent microdischarge breakdown, which is usually called the memory effects. [5,6,33] The surface charge inhibits the discharge breakdown during a half voltage cycle, on voltage reversal, however, it facilitates the discharge breakdown. In contrast, a large amount of active species form in volume, such as metastables, and negative ions.…”

Section: Segmentation Of the Discharge Imagementioning

confidence: 99%

“…The dielectric barrier discharges (DBDs) have been used in surface treatment, ozone generation, and gas flow control . In contrast to the discharges at low pressure, the DBDs at atmospheric pressure usually exhibit a filamentary character, more specifically a group of microdischarges that form on the same spot each time the polarity reverses . In 1991, Okazaki first realized glow discharges at atmospheric pressures in several kinds of gases, which are characterized by single current pulses in half voltage cycles and called them atmospheric pressure homogenous discharges .…”

Section: Introductionmentioning

confidence: 99%

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Influence of a Rotating Electrode on the Uniformity of an Atmospheric Pressure Air Filamentary Barrier Discharge

Yang

et al. 2013

Plasma Process. Polym.

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The uniform dielectric barrier discharges (DBD) consisting of numerous microdischarges in a long time‐scale may also meet the needs of industrial applications. In contrast to the glow DBDs, their uniformity is significantly influenced by the spatial distribution of microdischarges. In this paper, the streamers distribution in DBDs with rotating electrodes and the effects of the rotational speed on the discharge uniformity are investigated using a flow simulation and the SD of image gray levels, respectively. The simulation results show that the neutral gas flow caused by the electrode rotation has a great effect on the shape and length of the streamers. This has mainly contributed to the discharge remnant in the volume traveled by the neutral gas, which affects the discharge distribution. The SD of gray levels sharply decreases with an increase of the rotational speed, which indicates that the discharge uniformity can be effectively improved by the electrode rotation. When the rotational speed is over 3 000 rpm, the SD keeps almost constant, even with an increase of the applied voltage and frequency. It has similar characteristic as a uniform discharge.

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Section: Segmentation Of the Discharge Imagementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of a Rotating Electrode on the Uniformity of an Atmospheric Pressure Air Filamentary Barrier Discharge

Yang

et al. 2013

Plasma Process. Polym.

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“…The direct liquid phase discharge was operated in a classic point-to-plane electrode geometry reactor as previously reported [11,[44][45][46][47][48][49][50] where the setup required only some changes in the electrode geometry from the system described above. A short protrusion length (2 mm) needle was used as the high voltage electrode and without the gas bubbling along in liquid.…”

Section: Reactor Designmentioning

confidence: 99%

“…There are difficulties in the multi-pin electrode case due to as the difficulty of evenly distributing the electric input to each electrode which causes an intermittent discharge and requirements for a high power input to initiate the discharge. In order to further utilize the liquid phase discharge treatment without the disadvantages mentioned above (the high energy and electric field requirements and the needle electrode erosion), another method of externally introducing or thermally generating gas/vapor phase bubbles through the gap between two electrodes in the liquid phase has been investigated under several different setups [38][39][40][41][42][43][44][45]. A detailed review of these apparatus can be found in a previous literature review [14].…”

Section: Introductionmentioning

confidence: 99%

Chemical and Physical Characteristics of Pulsed Electrical Discharge Within Gas Bubbles in Aqueous Solutions

Shih¹,

Locke²

2009

Plasma Chem Plasma Process

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The chemical and physical characteristics of pulsed electrical discharge within gas bubbles immersed in an aqueous solution were investigated using a reactor with long protrusion length high voltage needle electrodes. Argon gas was introduced at the base of the needle electrode causing gas bubbles to flow upwards in contact with the needle. The effects of needle protrusion length were evaluated by using 2, 4, and 6 cm length needles under a wide range of power input (3-78 W). No significant differences in chemical or electrical characteristics were found among the different protrusion lengths. H 2 and H 2 O 2 generation rates were proportional to input power and the energy yield efficiency for these species was not affected dramatically by input power. The results of discharge within bubbles in aqueous solution were also compared with those for direct liquid phase discharge and gas phase discharge above the liquid surface.

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“…This has facilitated a number of electrical and optical studies on a single DBD filament [8][9][10][11]. Similarly, studies of the electrical characteristics of multiple streamer discharges in DBDs have been achieved by limiting the electrode area such that only a small number of streamers can occur per discharge cycle [12][13][14][15]. To date, these studies have allowed the measurement of the spatial and temporal properties of the streamers, and their electrical characteristics in a range of gasses.…”

Section: Introductionmentioning

confidence: 99%

Plasma-catalyst interaction studied in a single pellet DBD reactor: dielectric constant effect on plasma dynamics

Butterworth

Allen

2017

Plasma Sources Sci. Technol.

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A novel single dielectric pellet DBD that is designed to facilitate studying the interaction between plasmas and catalysts is presented. The influence of material dielectric constant on plasma dynamics across a range of applied voltages is determined through the use of electrical characterisation combined with videos of the discharge. Different discharge modes in nitrogen are observed and their behaviour is characterised. A particular focus is given to the phenomenon known as 'partial discharging'. This is where incomplete plasma formation occurs between the electrodes of the reactor, which may have implications for the fair testing of catalysts in packed bed reactors. Additionally, the occurrence of an 'almond shaped' QV plot in the event of pointto-point discharging in PBRs is explained. This work provides easily implemented analytical techniques that can be applied to understand the behaviour of plasmas within packed bed DBD reactors.

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Role of the volume and surface breakdown in a formation of microdischarges in a steady-state DBD

Cited by 41 publications

References 13 publications

Influence of a Rotating Electrode on the Uniformity of an Atmospheric Pressure Air Filamentary Barrier Discharge

Influence of a Rotating Electrode on the Uniformity of an Atmospheric Pressure Air Filamentary Barrier Discharge

Chemical and Physical Characteristics of Pulsed Electrical Discharge Within Gas Bubbles in Aqueous Solutions

Plasma-catalyst interaction studied in a single pellet DBD reactor: dielectric constant effect on plasma dynamics

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