Computation of non-equilibrium flow downstream of a plasma torchNumerical solutions of the Navier-Stokes equations for compressible reacting flow in an axisymmetric geometry are presented for a nitrogen plasma torch with both thermal and chemical nonequilibrium. The Navier-Stokes equations are solved using a new axisymmetric finite element/finite volume formulation in which the convective flux is treated by an extension of the approximate Riemann solver due to Osher. The numerical scheme is validated by comparison with a previous solution of the same problem using a different computational scheme. Results obtained using two different models of nonthermal dissociation rates are compared to experimental data.
Document ID
19920049034
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Harle, Christophe (NASA Headquarters Washington, DC United States)
Varghese, Philip L. (NASA Headquarters Washington, DC United States)
Carey, Graham F. (Texas, University Austin, United States)