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High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes
ESCI SJR: 0.176 SNIP: 0.48 CiteScore™: 1.3

ISSN Druckformat: 1093-3611
ISSN Online: 1940-4360

High Temperature Material Processes: An International Quarterly of High-Technology Plasma Processes

DOI: 10.1615/HighTempMatProc.v1.i3.70
pages 369-381

ANALYSIS OF DEVIATION FROM THERMAL AND IONIZATION EQUILIBRIUM IN AN ARGON PLASMA FLOW

Sergey V. Dresvin
Laboratory of Electrotechnological and Plasma Installation of Polytechnic Institute -SPb State Polytechnical University, 29 Polytechnicheskaya Str., 195251 Saint-Petersburg, Russia
Jacques Amouroux
Laboratoire de Genie des Precedes Plasmas Universite P. et M. Curie, ENSCP 11 rue P. et M. Curie 75005 Paris France
Nguen Quoc Shi
State Technical University, St Petersburg Russia

ABSTRAKT

The complex movement of gases in a plasma torch as in the plasma reactor is not only violate on the thermal equilibrium but also the ionization equilibrium. The deviation of the system from both thermal and ionization equilibria can be investigated with the help of the calculation of thermodynamic and transport properties in a two-temperature plasma.
The comprehension of the ionization equilibrium requires the knowledge of the recombination reaction coefficient in a three-body mechanism. Futhermore the deviation of the plasma thermodynamics and transport properties from the ionization equilibrium conditions depends on both the mean electronic and atom-ion gas temperature and also on the gas velocity.
In this paper, the recombination coefficents are experimentally measured and evaluated by theoriticaly calculations. So that we have been able to study the variation of the plasma temperature for the electrons, the ions and the atoms with the gas velocity. At last the temperature of heavy species like ions and atoms with and without deviation from the ionization equilibrium have been estimated and compared.


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