Mathematical simulation of ignition of a coal-dust suspension in air by a low-temperature plasma jet

1998 ◽  
Vol 39 (3) ◽  
pp. 441-446 ◽  
Author(s):  
A. D. Rychkov ◽  
M. F. Zhukov
Keyword(s):  
Low Temperature ◽  
Mathematical Simulation ◽  
Coal Dust ◽  
Plasma Jet ◽  
Low Temperature Plasma ◽  
Temperature Plasma

Lowtemperature plasma generator for effective processing of materials

2021 ◽  
Vol 77 (5) ◽  
pp. 587-592
Author(s):  
M. Kh. Gadzhiev ◽  
A. S. Tyuftyaev ◽  
Yu. M. Kulikov ◽  
M. A. Sargsyan ◽  
D. I. Yusupov ◽  
...  
Keyword(s):  
Low Temperature ◽  
Flow Rate ◽  
Gas Flow ◽  
Arc Discharge ◽  
Plasma Jet ◽  
Plasma Generator ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
High Enthalpy ◽  
High Resource

Low-temperature plasma is used in metallurgy for steel alloying by nitrogen, deoxidization of magnetic alloys, obtaining of steels with particularly low carbon content, metal cleaning of nonmetallic inclusions, desulfurization and other refining processes. The wide application of those technologies is restrained by absence of reliable generators of low-temperature plasma (GLP) with sufficient resource of continuous operation. As a result of studies, a universal generator of high-enthalpy plasma jet of various working gases was created. The generator has expanding channel of the output electrode with an efficiency of ~60 % for argon working gas and ~80% for nitrogen and air. It was shown that the developed generator of low-temperature plasma ensures formation of a weakly diverging (2α = 12°) plasma jet with a diameter D = 5–12 mm, an enthalpy of 5–50 kJ/g and a mass average temperature of 5–10 kK, at a full electric power of the arc discharge of 5–50 kW and a plasma-forming gas flow rate of 1–3 g/s. Results of the study of propane additions to the plasma-forming gas effect on the state of cathodes with inserts made of pure tungsten, lanthanum tungsten, and hafnium presented. It was shown that a small propane addition (1%) to the plasma-forming gas, results in reducing effect of the insert material. Study of the GLP operation at arc current 100A with addition to the working gas nitrogen maximum possible volume of propane, which don’t disturb stability of arc showed that for the developed plasma generator at the nitrogen flow rate ~0,45 g/s, the propane flow rate was ~0,33 g/s (not more than ~73 % of the plasma-forming gas). The created high-resource GLP with changeable electrodes enables to obtain at the exit a high-enthalpy plasma flow of various gases (argon, nitrogen, air) and can be a prototype of more powerful plasmotrons of various technological application, in particular for plasma metallurgy.

Liquid dynamics in response to an impinging low-temperature plasma jet

2018 ◽  
Vol 52 (7) ◽  
pp. 075203 ◽  
Author(s):  
T R Brubaker ◽  
K Ishikawa ◽  
H Kondo ◽  
T Tsutsumi ◽  
H Hashizume ◽  
...  
Keyword(s):  
Low Temperature ◽  
Plasma Jet ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Liquid Dynamics

Synergistic antibacterial effects of treatments with low temperature plasma jet and pulsed electric fields

2014 ◽  
Vol 105 (10) ◽  
pp. 104103 ◽  
Author(s):  
Qian Zhang ◽  
Jie Zhuang ◽  
Thomas von Woedtke ◽  
Juergen F. Kolb ◽  
Jue Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electric Fields ◽  
Pulsed Electric Fields ◽  
Plasma Jet ◽  
Low Temperature Plasma ◽  
Antibacterial Effects ◽  
Temperature Plasma

scholarly journals Low-temperature plasma generator for investigation of plasma jet with heat-resistant materials

2018 ◽  
Vol 33 (1) ◽  
pp. 50-56
Author(s):  
M.Kh. Gadzhiev ◽  
◽  
A.S. Tyuftyaev ◽  
E.Kh. Isakaev ◽  
N.A. Demirov ◽  
...  
Keyword(s):  
Low Temperature ◽  
Plasma Jet ◽  
Plasma Generator ◽  
Low Temperature Plasma ◽  
Temperature Plasma ◽  
Heat Resistant

scholarly journals Investigation of the role of chemically active radicals in the antibacterial properties of a low-temperature plasma jet at ambient pressure mixed with argon and air

2021 ◽  
Vol 2064 (1) ◽  
pp. 012109
Author(s):  
N A Ashurbekov ◽  
Z M Isaeva ◽  
K M Rabadanov ◽  
G S Shakhsinov ◽  
A A Murtazaeva ◽  
...  
Keyword(s):  
Low Temperature ◽  
Plasma Torch ◽  
Ambient Pressure ◽  
Antibacterial Properties ◽  
Plasma Jet ◽  
Plasma Source ◽  
Biological Tissues ◽  
Low Temperature Plasma ◽  
Temperature Plasma

Abstract The work is devoted to the study of a low-temperature plasma jet of atmospheric pressure in a mixture of air with argon, used in plasma medicine. The intensities of the spectral emission bands of OH– (309 nm), N2 (337 nm), and N2 (356 nm) in different parts of the plasma jet were investigated depending on the argon flow rate and the amplitude of voltage pulses at the electrodes of the dielectric barrier discharge. The antibacterial effect of such a plasma jet on the surface of biological tissues has been experimentally investigated. Numerical simulation of ionization processes in the studied plasma source has been performed in the COMSOL Multiphysics software using. The dynamics of the distribution of excited molecules in the plasma torch as well as the kinetic plasma processes inside the plasma torch affecting the spatial distribution of its main characteristics have been analyzed.

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