Discharge Characteristics in Atmospheric Pressure Glow Surface Discharge in Helium Gas

2005 ◽  
Vol 22 (2) ◽  
pp. 416-419 ◽  
Author(s):  
Li Xue-Chen ◽  
Wang Long
Keyword(s):  
Atmospheric Pressure ◽  
Surface Discharge ◽  
Discharge Characteristics ◽  
Helium Gas

Discharge and Flashover Behavior in Oil-Paper

2020 ◽  
pp. 105-128
Keyword(s):  
Electric Field ◽  
Operating Conditions ◽  
Surface Discharge ◽  
Discharge Characteristics ◽  
Dc Voltage ◽  
Composite Field ◽  
Field Distortion ◽  
Lightning Impulse ◽  
Creeping Discharge ◽  
Paper Insulation

Due to special operating conditions, the valve side bushing of the converter transformer connected to the converter valve is subject to complex voltage excitation, including DC voltage, AC/DC composite voltage, lightning impulse overvoltage, or composite voltage of operating overvoltage and DC. Under the action of this complicated electric field, the oil-paper insulation of the valve-side bushing of the converter transformer is prone to electric field distortion due to charge accumulation, which causes a surface discharge, which will seriously cause the edge breakdown. At the same time, since the temperature in the converter transformer rises due to a large amount of loss during the operation of the transformer, creeping discharge is more likely to occur under the electrothermal composite field. Hence, it is significant to carry out research on the surface discharge characteristics of the oil-paper insulation on the valve side of the converter transformer under the electrothermal composite field.

scholarly journals Dynamics of UV short pulse laser-induced plasmas from a ceramic material “titanium carbide”: a hydrodynamical out of equilibrium investigation

2019 ◽  
Vol 37 (01) ◽  
pp. 86-100
Author(s):  
A. Ait Oumeziane ◽  
J-D. Parisse
Keyword(s):  
Laser Beam ◽  
Ceramic Material ◽  
Material Properties ◽  
Atmospheric Pressure ◽  
Short Pulse ◽  
Plume Expansion ◽  
Pure Material ◽  
Short Pulse Laser ◽  
Helium Gas ◽  
Ionization Rates

AbstractThe present work is motivated by the numerous applications of short lasers–ceramics interaction. It aims at applying a newly developed model to investigate the dynamic of laser-induced plasmas from a ceramic material into a helium gas under atmospheric pressure. To have a better understanding of the link between the material properties, the plume characteristics and its interaction with the laser beam, a thorough examination of the entire ablation processes is conducted. Comparison with the behavior of laser-induced plumes under the same conditions from a pure material is shown to have a key role in shedding the light on what monitors the plume expansion in the background environment. Plume temperatures, velocities, ionization rates as well as elemental composition have been presented and compared under carefully chosen relevant conditions. This study is of interest for laser matter applications depending on the induced plasmas dynamics and composition.

scholarly journals Experimental study of atmospheric pressure surface discharge in helium

2001 ◽  
Vol 2 (3-4) ◽  
pp. 587-593 ◽  
Author(s):  
Miloslav Štefečka ◽  
Darlusz Korzec ◽  
Milan Širý ◽  
Yoji Imahori ◽  
Masashi Kando
Keyword(s):  
Experimental Study ◽  
Atmospheric Pressure ◽  
Surface Discharge ◽  
Pressure Surface

Generation of large-area and glow-like surface discharge in atmospheric pressure air

2016 ◽  
Vol 23 (8) ◽  
pp. 083520 ◽  
Author(s):  
Ying Song ◽  
Yang Xia ◽  
Zhenhua Bi ◽  
Xueyang Wang ◽  
Zhihua Qi ◽  
...  
Keyword(s):  
Atmospheric Pressure ◽  
Surface Discharge ◽  
Large Area
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