Plasma and Gas-Dynamic Near-Electrode Processes in Pulsed Discharge in Atmospheric Pressure Helium

The results of studies of the dynamics of near-electrode processes in the initial phase of the spark are presented. discharge in air at atmospheric pressure in the tip – plane geometry. Near the surface of a flat After the breakdown of the cathode, regions with a size of about 50 μm and more were recorded with an increased electron concentration of (3–8)•10^19 cm^(– 3). Based on experimental data on erosion the effect of a discharge on the surface of a flat electrode and the associated gas-dynamic effects a physical model of near-electrode processes is proposed, based on which estimates are made gas dynamic parameters.

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Time-resolved absolute OH density of a nanosecond pulsed discharge in atmospheric pressure He–H2O: absolute calibration, collisional quenching and the importance of charged species in OH production

Plasma Sources Science and Technology ◽

10.1088/0963-0252/23/4/045005 ◽

2014 ◽

Vol 23 (4) ◽

pp. 045005 ◽

Cited By ~ 6

Author(s):

T Verreycken ◽

N Sadeghi ◽

P J Bruggeman

Keyword(s):

Atmospheric Pressure ◽

Absolute Calibration ◽

Collisional Quenching ◽

Pulsed Discharge ◽

Time Resolved ◽

Charged Species

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Synthesis of silver nanoparticles by atmospheric-pressure pulsed discharge plasma in a slug flow system

Japanese Journal of Applied Physics ◽

10.7567/1347-4065/aaec1b ◽

2018 ◽

Vol 58 (1) ◽

pp. 016001 ◽

Cited By ~ 4

Author(s):

Motoki Yamada ◽

Shigenori Takahashi ◽

Wahyudiono ◽

Noriharu Takada ◽

Hideki Kanda ◽

...

Keyword(s):

Silver Nanoparticles ◽

Atmospheric Pressure ◽

Slug Flow ◽

Discharge Plasma ◽

Flow System ◽

Pulsed Discharge ◽

Pulsed Discharge Plasma

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Kinetics of radiative species in helium pulsed discharge at atmospheric pressure

Surface and Coatings Technology ◽

10.1016/s0257-8972(98)00797-x ◽

1999 ◽

Vol 112 (1-3) ◽

pp. 1-4 ◽

Cited By ~ 70

Author(s):

A. Ricard ◽

Ph. Décomps ◽

F. Massines

Keyword(s):

Atmospheric Pressure ◽

Pulsed Discharge ◽

Kinetics Of

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Акустические характеристики автоколебательного процесса, возникающего при взаимодействии сверхзвуковой недорасширенной струи с цилиндрической полостью

Журнал технической физики ◽

10.21883/jtf.2020.05.49172.345-19 ◽

2020 ◽

Vol 90 (5) ◽

pp. 733

Author(s):

К.Н. Волков ◽

В.Н. Емельянов ◽

А.В. Ефремов ◽

А.И. Цветков

Keyword(s):

Atmospheric Pressure ◽

Acoustic Waves ◽

Supersonic Jet ◽

Cavity Resonator ◽

Dynamic Structure ◽

Gas Jet ◽

Working Pressure ◽

Gas Dynamic ◽

Physical Pattern ◽

Cylindrical Cavities

In high-pressure gas-jet emitters, the source of sound energy is kinetic energy of gas jet at supercritical pressure ratios between the working pressure and the atmospheric pressure. Under certain conditions, interaction of a supersonic jet with the resonator is accompanied by powerful self-excited oscillating process with the generation of acoustic waves into the environment and cavity resonator. A model of a self-excited oscillating process arising from the interaction of non-isobaric jet with semi-closed cylindrical cavities, allowing to distinguish typical elements of gas-dynamic structure of the forming flow, is considered. The physical pattern of the flow in the cavity of gas-jet emitter is discussed, and a study of the dependence of the characteristics of the self-excited oscillating process on the gas-dynamic and geometric parameters is performed.

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