par Rini, Pietro 
;Garciay, A;Magin, Thierry ;Degrez, Gérard
Référence 34th AIAA Plasmadynamics and Lasers Conference(34: 2003-06-23), American Institute of Aeronautics and Astronautics
Publication Publié, 2003
;Garciay, A;Magin, Thierry ;Degrez, Gérard Référence 34th AIAA Plasmadynamics and Lasers Conference(34: 2003-06-23), American Institute of Aeronautics and Astronautics
Publication Publié, 2003
Publication dans des actes
| Résumé : | A methodology developed at IPM (Institute for Problems in Mechanics of Moscow), which relies on a combination of heat transfer and pitot pressure measurements in a subsonic plasma jet produced in an ICP facility and numerical simulations of the flow, is used for the determination of the catalytic properties of thermal protection materials to be used in a CO2 environment, typical of Mars entry conditions. Numerical tools developed at VKI have been assessed for air and are now extended for CO2 gas mixtures. In particular this work is focused on the finite rate chemistry part of the flow descrip- tion. During the course of this study the extension of the numerical tools required within the methodology for the determination of catalycity properties for Thermal Protection System materials in a CO2 flow has been completed. Two different mixtures have been defined concerning the simulation of a pure CO2 flow. The first one constituted by 5 species is suited for entry applications, while the second one is designed for plasma sim- ulation. Non equilibrium boundary layer computations have been performed for several outer edge conditions in order to compare with literature data. On the same cases the influence of the chemical model for bulk reactions has been analyzed. Moreover particu- lar attention has been devoted to wall surface reactions where the importance of several reactions has been discussed. This analysis revealed the limits of the model currently used, leading to the proposition of an alternative approach for the description of the flow-surface interaction. |
