par Scoggins, James Brice;Soucasse, Laurent;Rivière, Philippe;Soufiani, Anouar;Magin, Thierry 
Référence 45th AIAA Thermophysics Conference(45: 2015-06-22: Dallas), American Institute of Aeronautics and Astronautics Inc
Publication Publié, 2015
Référence 45th AIAA Thermophysics Conference(45: 2015-06-22: Dallas), American Institute of Aeronautics and Astronautics Inc
Publication Publié, 2015
Publication dans des actes
| Résumé : | A model for coupled flow, radiation, and ablation calculations for atmospheric entry vehicles is currently being developed to study the effects these coupled phenomena on each other as well as the predicted quantities of interest to vehicle designers such as the shear stress and heat flux on the surface of the vehicle. The flow model is based on the standard two-temperature, multicomponent, reacting Navier-Stokes equations with coupled radiative heat flux and photochemistry reduced to one-dimension using the stagnation line approximation. The radiative flux is computed using the hybrid statistical narrow band model (HSNB) which has been shown to accurately produce radiative properties at significantly reduced computational cost when compared to line-by-line calculations for uncoupled flows without ablation. HSNB model parameters are currently available for all dominant molec- ular systems, atomic lines, and continuum processes of Air and typical ablation products including CO2, CO, CN, CH, and C2. Ablation is treated through a simple equilibrium, steady-state ablation approximation, allowing ablation products to blow into the boundary layer. In the final paper, a full analysis of the effects of ablation products on radiative absorption will also be presented along with recommendations for future improvements and modeling. In addition, the validity of the HSNB model on coupled flows with ablation products will be assessed for typical Mars return cases. |
