The process for thermo-chemical ablation is modeled for a graphite heat-shield under Earth re-entry conditions. The re-entry flowfield is permitted to be in a state of thermo-chemical nonequilibrium for all chemical species. The heat conduction into the graphite heat-shield is modeled in multiple dimensions. To couple the flowfield and heat-shield, the appropriate boundary conditions of a surface mass balance and a surface energy balance are used. Chemical nonequilibrium effects are included in these surface balances. The ablation mechanism allows both oxidation and sublimation to occur. Steady-state results are presented for sphere-cone geometries at altitudes ranging from 40 km to 80 km. The freestream velocity is taken as 8 km/s for all cases. Two geometries with nose radii of 0.0127 m and 0.127 m and cone half-angles of 9° are considered.
|Original language||English (US)|
|State||Published - 1994|
|Event||AIAA/ASME 6th Joint Thermophysics and Heat Transfer Conference, 1994 - Colorado Springs, United States|
Duration: Jun 20 1994 → Jun 23 1994
|Other||AIAA/ASME 6th Joint Thermophysics and Heat Transfer Conference, 1994|
|Period||6/20/94 → 6/23/94|