Analysis of the size and shape of polydisperse dust particles in a complex glow discharge plasma

Дзлиева, Е. С.; Ermolenko, M. A.; Karasev, V. Yu.

doi:10.1134/s1063784212070092

Cited by 15 publications

(8 citation statements)

References 13 publications

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“…We studied exactly levitated particles, and the method of extraction of those trapped in the stratum of the glow discharge was worked out in Refs. .…”

Section: Introductionmentioning

confidence: 99%

Surface modification of melamine formaldehyde resin particles in a stratified glow discharge in neon

Karasev

Дзлиева

Pavlov

et al. 2019

Contributions to Plasma Physics

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The paper presents the description of the change in size and structure with time of the surface of polymer particles of melamine formaldehyde injected as a dust component of a complex plasma formed in a stratified glow discharge in neon. The experiment was carried out in a specialized discharge chamber, equipped with a device for collecting particles from a dust trap. The analysis of the size and surface structure was carried out by scanning electron microscopy, which gives the original and the resulting surface views of the plasma‐processed particles. These profiles show the variation in surface roughness distribution under the action of the plasma. The time dependence of the particle diameter on plasma exposure was tracked. Data show that 25 min of exposure results in the dust particles losing a substantial part of their volume, which is accompanied by a decrease of the diameter by half. Our results coincide with previous data for smaller particles in similar plasma conditions.The particles used in this work are larger but still are able to levitate in a dust trap, and corresponding processes of size degradation and surface modification are extremely intense.

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“…We studied exactly levitated particles, and the method of extraction of those trapped in the stratum of the glow discharge was worked out in Refs. .…”

Section: Introductionmentioning

confidence: 99%

Surface modification of melamine formaldehyde resin particles in a stratified glow discharge in neon

Karasev

Дзлиева

Pavlov

et al. 2019

Contributions to Plasma Physics

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“…This experimental setup was previously used for selecting particles with respect to shape and size [7][8][9]. In the present study, we have used particles of melamine-formaldehyde resin (MF-R) with a density of 1.5 g/cm 3 and average initial diameter of 7.8 μm.…”

mentioning

confidence: 99%

An experimental study of the degradation of particles in complex plasma

et al. 2015

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Abstract-Changes of melamine-formaldehyde resin (MF-R) particles occurring in complex dusty plasma have been investigated. Using a specially developed method, plasma-modified MF-R particles have been extracted from a dust trap after levitation for various periods of time and studied by electron microscopy techniques. Changes in the surface structure of MF-R particles are determined, and quantitative data on the variation in particle dimensions depending on the time of occurrence in plasma are obtained.

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“…The results show that both conductive particles with a diameter of less than 10-8 mm and dust particles in the air will reduce the discharge initiation voltage and breakdown voltage of the gas [17]. Ermolenko et al simulated and analysed with the influence of multiphase medium on the electric field of plasma reactor by finite element method, and proposed that water droplets/metal particles in the air gap can seriously distort the surrounding electric field, resulting in the formation of small corona area of air medium [18]. Yi et al found that many haze and haze external insulation discharge accidents in Guangzhou Power Grid include both insulator surface flashover caused by wet settlement and air gap breakdown discharge [10,16].…”

Section: Introductionmentioning

confidence: 99%

“…Ermolenko et al. simulated and analysed with the influence of multiphase medium on the electric field of plasma reactor by finite element method, and proposed that water droplets/metal particles in the air gap can seriously distort the surrounding electric field, resulting in the formation of small corona area of air medium [18]. Yi et al.…”

Section: Introductionmentioning

confidence: 99%

Effect of solid particle type, concentration and size on DC breakdown voltage of short needle‐plate air gap: An experiment and simulation study

et al. 2022

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Unclean air discharge refers to the discharge phenomenon of a large number of polluting gases, droplets or solid particles floating in the air, which will cause insulation breakdown and safety accidents for the power transmission equipment that have been left outdoors for a long time. In order to investigate the effects of particle concentration, particle size and dielectric constant on DC breakdown characteristics of unclean air gap, a self‐made discharge chamber was designed in this study. The air was filtered and passed into the discharge chamber to remove the influence of impurities contained in the air on the experimental results. Then, solid particles with different concentration, particle size and particle dielectric constant were added to the discharge chamber to carry out the DC positive polarity breakdown characteristic experiment. The experimental results show that compared with dry clean air, the presence of solid particle increases the breakdown voltage of the gap, and the increase proportion of breakdown voltage is related to the particle concentration, particle size and particle dielectric constant. With the same particle type and particle size, the increase proportion of breakdown voltage increases with the higher concentration, which up to 10.49%. For further investigating, the fluid mechanics model was selected to simulate the process of streamer discharge in unclean air. The results show that compared with dry clean air, the presence of particles enhances the gap discharge ionisation process, but also enhances the adsorption of particles, and the latter has stronger effect than the former, thus increases the gap breakdown voltage. At the same time, the enhancement of adsorption effect increases the electric field intensity of the gap and speeds up the development process of streamer discharge.

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Analysis of the size and shape of polydisperse dust particles in a complex glow discharge plasma

Cited by 15 publications

References 13 publications

Surface modification of melamine formaldehyde resin particles in a stratified glow discharge in neon

Surface modification of melamine formaldehyde resin particles in a stratified glow discharge in neon

An experimental study of the degradation of particles in complex plasma

Effect of solid particle type, concentration and size on DC breakdown voltage of short needle‐plate air gap: An experiment and simulation study

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