| Non-equilibrium reacting flows have been a subject of theoretical studies for the past thirty years. In recent years, our computational capabilities has developed to the point that these problems can now be modeled for the first time. Accordingly, viscous reacting flows are now being computed for benchmark test problems and are compared to available experimental data.;The present work involves a theoretical formulation and a new numerical model for solving the two-dimensional axisymmetric Navier Stokes equations for a multi-species reacting gas out of thermal and chemical equilibrium. The formulation is based on a mixed finite volume/finite element formulation for unstructured meshes. The convective flux is treated with an approximate Osher Riemann solver, the other fluxes are treated using P1 finite elements.;Most recent physical modeling for reacting gases is implemented (chemical reaction rate coefficients, multi-temperature model). A new first approximation radiation model is proposed. The sensitivity of the numerical results to these physical models is studied on test problems defined from benchmarks or experiments. From these analyses, an appropriate physical model is defined to permit the calculation of a new test problem for which neither experimental data nor numerical simulation is yet available. |
