The Influence of the Voltage Slope to the Homogeneous Multiple-Pulse Barrier Discharge at Atmospheric Pressure

2011 ◽  
Vol 50-51 ◽  
pp. 205-208
Author(s):  
Peng Xie ◽  
Yan Ling Liu ◽  
Shao Yan Cui
Keyword(s):  
Atmospheric Pressure ◽  
Barrier Discharge ◽  
Fluid Model ◽  
Voltage Amplitude ◽  
One Dimensional ◽  
Current Pulses ◽  
Variable Voltage ◽  
Simulation Results ◽  
Operating Factor ◽  
Polygonal Function

The homogeneous barrier discharge with multiple current pulses at atmospheric pressure in helium is numerically studied on the basis of one-dimensional fluid model .The influence of the applied periodic polygonal function voltage slope to the intervals of the corresponding current pulses and the power are discussed and analyzed.The simulation results show that ,in the case of invariable voltage amplitude and variable voltage slope,the number of current pulses , intervals of the corresponding current pulses and the operating factor of the power are changing.

Development of Non-Equilibrium Simulation Model of Gas Tungsten Arc

2008 ◽  
Vol 580-582 ◽  
pp. 659-662
Author(s):  
Tashiro Shinichi ◽  
Toru Iwao ◽  
Tuginori Inaba ◽  
Manabu Tanaka
Keyword(s):  
Simulation Model ◽  
Atmospheric Pressure ◽  
Anode Surface ◽  
Plasma Property ◽  
One Dimensional ◽  
Gas Tungsten Arc ◽  
Simulation Results ◽  
Equilibrium Region ◽  
Equilibrium Simulation ◽  
Non Equilibrium

We have developed non-equilibrium simulation model of GTA. In this paper, simulation results of plasma property of argon GTA at atmospheric pressure are presented and, furthermore, the reliability of the simulation model is evaluated. As a result, it was revealed that non-equilibrium characteristic appears in regions close to both electrodes and the fringe of the arc column where the temperatures decrease below approximately 10000K. It was also found that non-equilibrium region near the anode surface has thickness of 0.3mm. This result agrees with the simulation result predicted with one-dimensional electrical sheath model.

Research on the Time and Space Characteristic of Argon Dielectric Barrier Discharge at Atmospheric Pressure

2014 ◽  
Vol 1008-1009 ◽  
pp. 630-634
Author(s):  
Zhi Nan Liu ◽  
Hui Min Ge
Keyword(s):  
Applied Voltage ◽  
Atmospheric Pressure ◽  
Fluid Model ◽  
Electrical Characteristics ◽  
Number Density ◽  
Plasma Parameters ◽  
One Dimensional ◽  
Space Characteristic ◽  
Discharge Gap ◽  
Bright Area

Numerical calculations with time dependant one-dimensional fluid model are performed at various conditions in argon atmospheric pressure to calculate electrical characteristics and plasma parameters including charged and metastable molecules densities. The simulation results show after steady discharge are formed, the voltage of discharge gap nearly remain constant and the phase is 0.36π advance of the applied voltage; The current density are in the same period as the applied voltage, the phase is 0.58π ahead of the applied voltage; The steady state Ar are in high number density in the whole discharge gap; The Ar* number density appear peak at the middle of the discharge gap; The Ar+ number density appear peak in the negative bright area.

Numerical Simulation of Atmospheric Pressure Glow Discharges in Coaxial Tube

2013 ◽  
Vol 475-476 ◽  
pp. 1567-1571
Author(s):  
Chun Xiao Zhao ◽  
Jun Lu
Keyword(s):  
Numerical Simulation ◽  
Current Pulse ◽  
Discharge Current ◽  
Atmospheric Pressure ◽  
Fluid Model ◽  
Cylindrical Geometry ◽  
One Dimensional ◽  
Glow Discharges ◽  
Coaxial Tube ◽  
Voltage Peak

The dynamics of atmospheric pressure glow discharges in coaxial tube have been numerically studied by a self-consist, one-dimensional fluid model. An asymmetric discharge current pulse, which operated in glow mode, was obtained in the cylindrical geometry. As the frequency or the voltage peak is increased, the discharge transits into a period-two state.

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