Magnetic opening switch shaping the pressure pulse for high-speed liner implosion by high-current explosive generator

2004 ◽  
Author(s):  
V.K. Chernyshev ◽  
V.N. Mokhov ◽  
Petrukhin ◽  
V.A. Vasyukov ◽  
V.B. Yakubov ◽  
...  
Keyword(s):  
High Speed ◽  
Pressure Pulse ◽  
High Current ◽  
Opening Switch

High-Current Plasma Current Opening Switch Powered from Magneto-Cumulative Generator

2007 ◽  
Author(s):  
A.S. Boriskin ◽  
P.N. Burenkov ◽  
V.A. Demidov ◽  
P.I. Golyakov ◽  
S.A. Kazakov ◽  
...  
Keyword(s):  
Plasma Current ◽  
High Current ◽  
Opening Switch

scholarly journals Mechanisms Responsible for Arc Cooling in Different Gases in Turbulent Nozzle Flow

2017 ◽  
Vol 4 (3) ◽  
pp. 234-240 ◽  
Author(s):  
Y. Guo ◽  
H. Zhang ◽  
Y. Yao ◽  
Q. Zhang ◽  
J. D. Yan
Keyword(s):  
Material Properties ◽  
High Speed ◽  
Gas Flow ◽  
Ohmic Heating ◽  
Circuit Breaker ◽  
Fault Current ◽  
High Current ◽  
Physical Mechanisms ◽  
Current Zero ◽  
Different Gases

A high voltage gas blast circuit breaker relies on the high speed gas flow in a nozzle to remove the energy due to Ohmic heating at high current and to provide strong arc cooling during the current zero period to interrupt a fault current. The physical mechanisms that are responsible for the hugely different arc cooling capabilities of two gases (SF<sub>6</sub> and air) are studied in the present work and important gas material properties controlling the cooling strength identified.

Study on Arc and Drop Transfer Behaviors of DCEN MAG Welding

2014 ◽  
Vol 887-888 ◽  
pp. 1290-1293
Author(s):  
Xu Ming Wang ◽  
Qing Xia Bi
Keyword(s):  
Direct Current ◽  
High Speed ◽  
Welding Process ◽  
Mag Welding ◽  
High Speed Camera ◽  
High Current ◽  
Current Electrode ◽  
The Stability

By means of the high speed camera, the arc and drop transfer behaviours of direct current electrode negative MAG welding process are researched. The influences of luminous arc ball on the stability of MAG welding process are analyzed. On this basis, the process interval of DCEN MAG welding is determined. And the influences of wire polarity on wire melting coefficient are compared. By using the shield gas 98%Ar + 2%O2, the stable drop transfer manner can be divided into two kinds: dropwise transfer with low current, and streaming transfer with high current.

Application of High Speed Framing Camera in Debugging of High Current and Pulsed Electron Beam

2014 ◽  
Vol 51 (2) ◽  
pp. 022201
Author(s):  
江孝国 Jiang Xiaoguo ◽  
王远 Wang Yuan ◽  
代志勇 Dai Zhiyong ◽  
杨志勇 Yang Zhiyong ◽  
李洪 Li Hong ◽  
...  
Keyword(s):  
Electron Beam ◽  
High Speed ◽  
High Current ◽  
Pulsed Electron Beam ◽  
Framing Camera

Use of a liquid shock tube as a device for the study of material deformation under impulsive loading conditions

2004 ◽  
Vol 218 (1) ◽  
pp. 39-51 ◽  
Author(s):  
B W Skews ◽  
O E Kosing ◽  
R J Hattingh
Keyword(s):  
Shock Tube ◽  
Deformation Process ◽  
High Speed ◽  
Pressure Pulse ◽  
Applied Pressure ◽  
Impulsive Loading ◽  
High Speed Photography ◽  
Material Deformation ◽  
Metal Plates ◽  
Versatile Tool

The deformation of metal plates and tubes achievable through the use of liquid shock waves generated in a shock tube is studied, with reference to both free-forming and forming the metal into dies, as well as to imprinting detailed features. The process is highly controllable, in terms of the magnitude and duration of the applied pressure pulse. A projectile is fired into a liquid column producing a high-pressure liquid shock wave which impinges on the testpiece. Different projectile materials, driving pressures and impact velocities are used to alter the energy and impulse transmitted. A particular attraction of its use in a laboratory is the application of high-speed photography to the deformation process. Illustration of the application of the facility to slamming studies and to fracture of brittle materials is included. It is concluded that the techniques employed offer a useful and versatile tool for many studies of material deformation.

scholarly journals Investigation and Numerical Simulation of a High-Current AC Circuit Breaker

2019 ◽  
Vol 6 (3) ◽  
pp. 235-238
Author(s):  
I. Murashov ◽  
V. Frolov ◽  
A. Kvashnin ◽  
J. Valenta ◽  
D. Simek ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Mathematical Model ◽  
High Speed ◽  
Circuit Breaker ◽  
Moving Mesh ◽  
Electrical Characteristics ◽  
High Current ◽  
Spectral Diagnostics ◽  
Current Voltage ◽  
Time Calculation

The article is devoted to the study of the high-current AC circuit breaker. The results of the study are presented for various configurations of the arc divider. The study includes methods of spectral diagnostics and high-speed camera shooting synchronized with the electrical characteristics of the circuit breaker (current, voltage) in time. The obtained results allow to determine the composition of the plasma and dynamics of changes in the composition of the discharge in time. Calculation of the plasma composition and properties is made according to the obtained data, which makes it possible to take into account the products of circuit breaker materials ablation in numerical simulation. Non-stationary two-dimensional mathematical model with a moving mesh is developed. The obtained results allow to correct and verify the developed mathematical model of the circuit breaker operation. The evaluation of the arc divider influence is presented in the article.

RS-20MR High-Current Relativistic Electron Beam Generator Based on a Plasma Opening Switch and Its Applications

2019 ◽  
Vol 45 (4) ◽  
pp. 315-324
Author(s):  
G. I. Dolgachev ◽  
E. D. Kazakov ◽  
Yu. G. Kalinin ◽  
D. D. Maslennikov ◽  
A. A. Shvedov
Keyword(s):  
Electron Beam ◽  
Relativistic Electron ◽  
Relativistic Electron Beam ◽  
High Current ◽  
Plasma Opening Switch ◽  
Opening Switch

scholarly journals State-of-the-Art and Advancement Paths for Inductive Pulsed Plasma Thrusters

Aerospace ◽  
2020 ◽  
Vol 7 (8) ◽  
pp. 105 ◽  
Author(s):  
Kurt Polzin ◽  
Adam Martin ◽  
Justin Little ◽  
Curtis Promislow ◽  
Benjamin Jorns ◽  
...  
Keyword(s):  
High Speed ◽  
State Of The Art ◽  
Pulsed Plasma ◽  
High Current ◽  
Flux Lines ◽  
Pulsed Plasma Thruster ◽  
Pulsed Plasma Thrusters ◽  
Technology Advancement ◽  
Magnetic Flux Lines ◽  
Plasma Thruster

An inductive pulsed plasma thruster (IPPT) operates by pulsing high current through an inductor, typically a coil of some type, producing an electromagnetic field that drives current in a plasma, accelerating it to high speed. The IPPT is electrodeless, with no direct electrical connection between the externally applied pulsed high-current circuit and the current conducted in the plasma. Several different configurations were proposed and tested, including those that produce a plasma consisting of an accelerating current sheet and those that use closed magnetic flux lines to help confine the plasma during acceleration. Specific impulses up to 7000 s and thrust efficiencies over 50% have been measured. The present state-of-the-art for IPPTs is reviewed, focusing on the operation, modeling techniques, and major subsystems found in various configurations. Following that review is documentation of IPPT technology advancement paths that were proposed or considered.

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