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Val, Anabel Del
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Characterization under Uncertainty of Catalytic Phenomena in Ceramic Matrix Composites Materials for Spacecraft Thermal Protection Systems
Abstract
This work focuses on the characterization of current spacecraft thermal protection materials, including experimental and model uncertainties. The catalysis phenomena affecting re-usable heat shield materials is considered in the physical model through a parameter that represents the exothermic recombination of atoms taking place at the material surface. Uncertainty distributions of this recombination parameter are obtained by means of a Bayesian inference framework where the model parameter is inferred from experimental data generated in a plasma wind tunnel. The testing methodology developed confirms to be a reliable experimental approach for characterizing the material and the enthalpy of the flow.