Based on two-dimensional full Navier-Stokes equations the flow about stagnation point of spherically blunted body at hypersonic flight in the atmosphere of the Earth is investigated. The problem is being solved taking into account non-equilibrium physical-chemical processes (vibration relaxation, vibration-dissociation coupling, dissociation, chemical reactions, ionization). Convective heat fluxes at the stagnation point are compared to ones obtained using simplified engineering technique.

Numerical simulation of high enthalpy flow in the nozzle of wind tunnel VAT-104 is carried out using a detailed model of nonequilibrium physical and chemical processes. An implicit staggered-grid scheme of the second order of accuracy is used to approximate the governing equations. The goals of this modeling are: (1) to test a numerical approach to simulate high temperature nonequilibrium flows, (2) to determine the role of processes important for energy exchange at the nozzle flow conditions, (3) to get numerical values of species mass fractions and molecule vibration temperatures along the nozzle and at the entry to the test part. The illustrations below show the profile of VAT-104 nozzle, the difference scheme stencils, the N and N 2 mass fraction profiles and vibration temperatures profiles along the nozzle.