Equilibrium real gas upgrade and restructure of the perfect gas parc2d code using the partition function approach for the thermochemical properties and kinetic theory for the transport properties

A two-dimensional, implicit Beam and Warming Navier-Stokes code is upgraded to include real gas effects. The flow solver allows the computation of the conservative variables assuming either a perfect gas or a real gas in chemical equilibrium. Within the real gas model, all thermochemical properties are evaluated, using quantum and statistical mechanics, and the transport properties are obtained from kinetic theory at a local temperature and pressure. The enthalpy, specific heat at constant pressure, an equilibrium gamma, the ratio of enthalpy to internal energy, viscosity, thermal conductivity, and binary diffusion for an air mixture are then transferred to the fluid dynamics solver, and this process is repeated until convergence is attained. This real gas code, PARCEQ2D, is verified on the AFE and comparisons are made against existing experimental data as well as with other current CFD codes.