NDLI: Modeling of the Subsonic–Supersonic Flow and Heat Transfer in a DC Arc Plasma Torch

Content Provider	Springer Nature Link
Author	Han, Peng Chen, Xi
Copyright Year	2001
Abstract	Two-dimensional modeling results are presented concerning the subsonic–supersonic flow and heat transfer within a DC plasma torch used for low-pressure (or soft vacuum) plasma spraying. The so-called fictitious anode method is used in the modeling in order to avoid inclusion of the complex three-dimensional effects near the anode arc root and also to avoid the forced heating of all the incoming cold gas stream by the arc. A nonorthogonal boundary-conforming grid, nonstaggered variable arrangement and the all-speed SIMPLE algorithm are employed for the solution of the governing equations, including gas viscous effects, temperature-dependent properties, and compressible effects. Good agreement of the predictions with available results for a few benchmarked compressible flow problems shows that the new version of the FAST-2D program can be employed for the present plasma flow modeling. Temperature, axial velocity, Mach number, and static pressure contours, and streamlines within the DC arc plasma torch are presented to show the flow and heat transfer characteristics. The flow transits gradually from upstream subsonic regime into downstream supersonic regime with the subsonic–supersonic transition within the cylindrical segment of the torch nozzle. Additional numerical tests show that gas viscosity and Lorentz force have only a slight effect on the plasma flow.
Starting Page	249
Ending Page	264
Page Count	16
File Format	PDF
ISSN	02724324
Journal	Plasma Chemistry and Plasma Processing
Volume Number	21
Issue Number	2
e-ISSN	15728986
Language	English
Publisher	Kluwer Academic Publishers-Plenum Publishers
Publisher Date	2001-01-01
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Characterization and Evaluation Materials Mechanics Nuclear Physics, Heavy Ions, Hadrons Mechanical Engineering
Content Type	Text
Resource Type	Article
Subject	Chemistry Surfaces, Coatings and Films Condensed Matter Physics Chemical Engineering

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