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 are root and also to avoid the forced heating of all the incoming cold gas stream by the are. A nonorthogonal boundary-conforming grid, nonstaggered variable arrangement and the all-speed SIMPLE algorithm ore 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 pow modeling. Temperature, axial velocity, Mach number, and static pressure contours, and streamlines within the DC are plasma torch are presented to show the pow 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 rests show that gas viscosity and Lorenz force have only a slight effect on the plasma flow.