High Temperature Material Processes (An International Quarterly of High-Technology Plasma Processes) An International Journal

ISSN for PRINT: 1093-3611

For Online Access

Best Paper Award Selection - Editorial Board Site

2001, Volume5

Issue 4

162 pages

Issue price - $144.00

J. Stevefelt
Universitaire de Bourges, Rue Gaston Berger, BP 4043, 18028 Bourges Cedex, France. Present address: CELIA, Universite Bordeaux 1, 351 Cours de la Liberation, 33405 Talence Cedex, France

S. Pellerin
Laboratoire d'Analyse Spectroscopique et d'Energétique des Plasmas (LASEP), Université d'Orleans -Site de Bourges, rue Gaston Berger, BP 4043,18028 Bourges cedex, FRANCE

J. Chapelle
LASEP, Centre Universitaire de Bourges, Rue Gaston Berger, BP 4043, 18028 Bourges Cedex, France

The spatial and temporal evolution of the concentration of atomic radicals [H] in a high-temperature hydrogen gas column has been evaluated, assuming constant pressures in the range from 0,25 to 1.0 bar (1 bar = 10⁵ Pa) and temperature decaying by heat conduction while energy is released by the termolecular recombination processes. The initial concentration [H], assumed to correspond to thermal equilibrium at 5000 К, would increase with .pressure, but the recombination also becomes faster with increasing pressure. As a result, high concentration of atomic radicals rapidly becomes favoured by lower gas pressure after the temperature has decayed for a certain time. Also, operation at lower pressures would make the decay of [H] radicals less dependent upon the radius of the gas column.

Download article, 16 pages

Article price - $35.00

<< Previous article   Next article >>