Simulation of Ablationin a Sounding Rocket Thermal Protection System via an Interface Tracking Method with Two Moving Fronts

Humberto Araujo Machado

Abstract


http://dx.doi.org/10.5028/jatm.v5i4.262

In this work, an interface tracking method is employed to simulate the ablative process in the region near the stagnation point of the VSB-30 sounding rocket Thermal Protection System (TPS). The ablation model considers the presence of two-fronts, the char-melting and the pyrolysis fronts. The results for the proposed model are compared to the ones obtained from the traditional one-front model, which supposes a constant ablation temperature. Results show that the one-front model overestimates the ablation period, mass loss and the internal temperature after the flight. The increase in the accuracy with this model shall provide a better dimensioning of the TPS, reducing its weight and cost.


Keywords


TPS; Ablation; Moving boundary; Computational simulation; Sounding rocket

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