Numerical Investigation of Non-Equilibrium Radiation of CO2-N2 Mixtures in a Shock Viscous Layer
Abstract
A heat transfer and radiation problem for a capsule entering into the Martian atmosphere are considered. The numerical flowfield solution is obtained in the framework of Navier-Stokes equations which are expanded with mass conservation equations for electronically excited states of diatomic molecules accounting for convection, diffusion and excitation processes. Thermo-chemical model of the CO2-N2 mixtures for the calculation of the non-equilibrium ultra- violet (UV) molecular band radiation in the high temperature shock layer around the capsule during an entry is presented. The model takes into account 19 chemical reactions and 34 excitation processes of electronic molecular states. The latter include excitation in heavy particle and free electron collisions as well as spontaneous emission. Distributions of flow parameters across the shock layer are obtained and UV molecular band radiation spectra are calculated in several trajectory points.
- Publication:
-
6th European Symposium on Aerothermodynamics for Space Vehicles
- Pub Date:
- January 2009
- Bibcode:
- 2009ESASP.659E..82G