Two-dimensional kinetic simulation of plasma dynamics in the post-arc stage of vacuum circuit breakers

2020 ◽  
Vol 27 (1) ◽  
pp. 013501
Author(s):  
Dan Wang ◽  
Lijun Wang ◽  
Jie Liu ◽  
Chao Yan ◽  
Xin Lin ◽  
...  
Keyword(s):  
Kinetic Simulation ◽  
Two Dimensional ◽  
Circuit Breakers ◽  
Plasma Dynamics

scholarly journals A Simulation of the Effects of Varying Repetition Rate and Pulse Width of Nanosecond Discharges on Premixed Lean Methane-Air Combustion

2012 ◽  
Vol 2012 ◽  
pp. 1-11 ◽  
Author(s):  
Moon Soo Bak ◽  
Mark A. Cappelli
Keyword(s):  
Repetition Rate ◽  
Pulse Width ◽  
Electronic States ◽  
Total Power ◽  
Critical Element ◽  
Kinetic Simulation ◽  
Two Dimensional ◽  
Pulsed Discharges

Two-dimensional kinetic simulation has been carried out to investigate the effects of repetition rate and pulse width of nanosecond repetitively pulsed discharges on stabilizing premixed lean methane-air combustion. The repetition rate and pulse width are varied from 10 kHz to 50 kHz and from 9 ns to 2 ns while the total power is kept constant. The lower repetition rates provide larger amounts of radicals such as O, H, and OH. However, the effect on stabilization is found to be the same for all of the tested repetition rates. The shorter pulse width is found to favor the production of species in higher electronic states, but the varying effects on stabilization are also found to be small. Our results indicate that the total deposited power is the critical element that determines the extent of stabilization over this range of discharge properties studied.

Kinetic Simulation of a Time-Dependent Two-Dimensional Plasma

1994 ◽  
Vol 112 (2) ◽  
pp. 226-233 ◽  
Author(s):  
W.N.G. Hitchon ◽  
E.R. Keiter
Keyword(s):  
Time Dependent ◽  
Kinetic Simulation ◽  
Two Dimensional

Experimental study of the stability and dynamics of a two-dimensional ideal vortex under external strain

2018 ◽  
Vol 848 ◽  
pp. 256-287 ◽  
Author(s):  
N. C. Hurst ◽  
J. R. Danielson ◽  
D. H. E. Dubin ◽  
C. M. Surko
Keyword(s):  
Ideal Fluid ◽  
Experimental Studies ◽  
Quantitative Agreement ◽  
Two Dimensions ◽  
Global Dynamics ◽  
Two Dimensional ◽  
Plasma Dynamics ◽  
Electron Plasmas ◽  
Precise Control ◽  
The Stability

The dynamics of two-dimensional (2-D) ideal fluid vortices is studied experimentally in the presence of an irrotational strain flow. Laboratory experiments are conducted using strongly magnetized pure electron plasmas, a technique which is made possible by the isomorphism between the drift–Poisson equations describing plasma dynamics transverse to the field and the 2-D Euler equations describing an ideal fluid. The electron plasma system provides an excellent opportunity to study the dynamics of a 2-D Euler fluid due to weak dissipation and weak 3-D effects, simple diagnosis and precise control. The plasma confinement apparatus used here was designed specifically to study vortex dynamics under the influence of external flow by applying boundary conditions in two dimensions. Additionally, vortex-in-cell simulations are carried out to complement the experimental results and to extend the parameter range of the studies. It is shown that the global dynamics of a quasi-flat vorticity profile is in good quantitative agreement with the theory of a piecewise-constant elliptical patch of vorticity, including the equilibria, dynamical orbits and stability properties. Deviations from the elliptical patch theory are observed for non-flat vorticity profiles; they include inviscid damping of the orbits and modified stability limits. The dependence of these phenomena on the flatness of the initial profile is discussed. The relationship of these results to other theoretical, numerical and experimental studies is also discussed.

Two-dimensional positive column structure with dust cloud: Experiment and nonlocal kinetic simulation

2018 ◽  
Vol 25 (3) ◽  
pp. 033702 ◽  
Author(s):  
A. V. Zobnin ◽  
A. D. Usachev ◽  
O. F. Petrov ◽  
V. E. Fortov ◽  
M. H. Thoma ◽  
...  
Keyword(s):  
Positive Column ◽  
Dust Cloud ◽  
Kinetic Simulation ◽  
Two Dimensional ◽  
Column Structure

scholarly journals Experimental Investigation on the Arc Characteristics and Arc Quenching Capabilities of C5F10O-CO2 Mixtures

2019 ◽  
Vol 6 (3) ◽  
pp. 231-234
Author(s):  
Z. Guo ◽  
F. Tang ◽  
Q. Lv ◽  
X. Li ◽  
B. Zhang ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
High Speed ◽  
Inverse Transformation ◽  
High Speed Camera ◽  
Two Dimensional ◽  
Circuit Breakers ◽  
Arc Voltage ◽  
Arc Characteristics ◽  
Dimensional Distribution ◽  
The Stability

C<sub>5</sub>F<sub>10</sub>O-CO<sub>2</sub> mixtures are possible alternatives to SF<sub>6</sub> - which has a high global warming potential - as the interruption medium in gas circuit breakers. This paper experimentally studies the arcing characteristics of C<sub>5</sub>F<sub>10</sub>O-CO<sub>2</sub> mixture, with an experimental model with viewing windows, and measures the arc voltage, current and emission spectrum. The arc evolution process is captured with a high speed camera through an inspection window. The two-dimensional distribution of arc is obtained and analyzed by the inverse transformation of Abel. The results show that, the C<sub>5</sub>F<sub>10</sub>O-CO<sub>2</sub> mixture arc is more volatile than SF<sub>6</sub> gas, and adding C<sub>5</sub>F<sub>10</sub>O into CO<sub>2</sub> improves the stability of the arc, and significantly reduces the arc temperature.

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