Arc Behavior and Temperature Distribution in Water Thermal Plasma with Mist Generation

AbstractFor pollution control the non-thermal plasma seems to be the most convenient source of energetic electrons and chemically active species. In the electrical discharges the non-thermal plasma condition at atmospheric pressure can be obtained with fast gas flow through the discharge chamber volume, like in DC glow discharge or AC gliding arc discharge. The electrons temperature and its volumetric distribution is one of the fundamental parameters that should be study if we want to obtain the non-equilibrium low temperature plasma conditions in given geometry of the plasma reactor. These conditions depend on the kind of plasma gas and its velocity, geometry of the gliding arc reactor and on parameters of the power supply system. Paper presents a simplified mathematical model of the two -electrode gliding arc reactor to determine electron temperature and its distribution. Results of calculations are useful for selection of the power supply systems parameters and their design as to ensure the non-equilibrium state of gliding arc discharge plasma. Further calculations aim at three-and multielectrode reactors and three-dimension temperature distribution.

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Effect of a substrate on the temperature distribution in an argon-hydrogen thermal plasma jet

Plasma Chemistry and Plasma Processing ◽

10.1007/bf01570204 ◽

1994 ◽

Vol 14 (4) ◽

pp. 407-423 ◽

Cited By ~ 15

Author(s):

D. Lapierre ◽

R. J. Kearney ◽

M. Vardelle ◽

A. Vardelle ◽

P. Fauchais

Keyword(s):

Temperature Distribution ◽

Thermal Plasma ◽

Plasma Jet ◽

Thermal Plasma Jet

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The Influence of Plasma Arc Behavior on Ingot Top Surface Temperature Distribution during PAM Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.709.313 ◽

2013 ◽

Vol 709 ◽

pp. 313-319 ◽

Cited By ~ 1

Author(s):

Hai Song Li ◽

Hong Chao Kou ◽

Feng Xu ◽

Hui Chang

Keyword(s):

Heat Flux ◽

Temperature Distribution ◽

Surface Temperature ◽

Element Model ◽

Plasma Arc ◽

Temperature Changes ◽

Surface Temperature Distribution ◽

Regional Center ◽

Arc Behavior ◽

Arc Heating

A 3D finite element model was established to simulate the top surface temperature evolution of Ti45Al8Nb (at.%) alloy ingot under the effect of plasma arc behavior during plasma arc cold hearth melting (PAM) process. According to the model, the top surface temperature distribution and its evolution was analyzed under different heat flux densities. Simulation results show that the position of maximum top surface temperature changes with plasma arc motion, and always located in the plasma arc heating regional center, and it increases first with time elapse and then decreases in the rest of time within one cycle. The results also show that the top surface temperature is increased with the increase in heat flux densities, but the extent is not significant, and meanwhile the temperature distribution is more non-uniform and temperature gradient is greater with the increase in heat flux densities.

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