Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
THERMO-STRUCTURAL ANALYSIS OF CHAR LAYER IN COMPOSITE ABLATION OF SARA SUB-ORBITAL TPS
Submission Author:
Humberto Machado , SP , Brazil
Presenter: Humberto Machado
doi://10.26678/ABCM.ENCIT2016.CIT2016-0021
Abstract
Space and suborbital vehicles reach high temperatures due the aerodynamic warming, especially in the case of recoverable ones during the atmospheric re-entry. Commonly ablative composites are used as heat shields in the regions near the stagnation point. During the ablation of composites, a char layer is formed in the external surface, which acts as thermal insulator and protects the pyrolysis zone of the atmospheric oxygen that could produce an exothermic reaction, adding heat to the shield instead of reducing it. In this work, the two-dimensional computational simulation of the ablative process in composites used in rocket thermal protection systems via an interface tracking method and a thermo-structural analysis of the resulting char layer is performed, in order to investigate if the integrity of such layer is affected by melting or thermal stresses.
Keywords
Composite ablation, TPS, structural analysis
