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Procesy difuze v H2O-Ar plazmovém hořáku
Křenek, Petr
In the hybrid water/argon plasma torch [2] the arc column is composed of argon-stabilized section followed by a section stabilized by water vortex, where argon plasma is mixed with steam evaporated from the stabilizing water wall. At the nozzle outlet the H2O & Ar mixture is supposed. For modelling the mixing processes in the torch composition and diffusion coefficients of steam-argon gas mixtures are needed. In this introductory study the composition and the diffusion coefficients of H2O-Ar plasma were computed in the temperature range 300 K to 50 000 K and pressure 0.1 MPa under the assumption of local thermodynamic equilibrium. The composition was calculated using mass action laws and particle and charge balance equations. Following components were considered: e, H, H+, H-, H2, H2+, H3+, O, O+, O2+, O3+, O4+, O5+, O6+, O-, O2, O2+, O2-, O3, OH, OH+, OH-, HO2, HO2-, H2O, H2O+, H2O2, H3O+, Ar, Ar+, Ar2+, Ar3+.
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