Numerical simulations of argon plasma jets flowing into cold air

摘要: Computational results and comparisons with experimental data are presented for simulations of axisymmetric turbulent argon plasma jets flowing into a cold air environment. The calculations were performed using the LAVA code [J. D. Rarnshaw C. H. Chang,Plasma Chem. Plasma Process.12, 299 (1992)], designed to simulate experiments by Brossa Pfender (Plasma Process.8, 75 (1988)) (BP) Finckeet al (private communication, 1992] (FSH). To our knowledge, these first such in which multicomponent diffusion interactions between dissociation ionization different species consistently, accounted for. Turbulence effects represented standardκ-ɛ model, both without an jet correction term several choices Prandil Schmidt numbers Prt Scl. Simulations one FSH experiment two BP at values torch powerP flow rateW. inflow profiles adjusted matchP,W, slightly downstream exit as closely possible. same profile shapes then used matchP andW simulations, near not available. Swirl was neglected except calculations, where it found have negligible effect, expected. Best obtained omitted = Scl 0.7. Agreement lair overall, but still showed systematic deviations cannot be regarded fully satisfactory. Possible reasons discrepancies discussed.