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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
PRESSURE DISTRIBUTION IN THE CHAR LAYER OF A POLIMERIC COMPOSITE ABLATOR
Submission Author:
Humberto Machado , SP , Brazil
Co-Authors:
Humberto Machado, Pamela Torsani
Presenter: Humberto Machado
doi://10.26678/ABCM.ENCIT2020.CIT20-0116
Abstract
Polymeric composites are extensively used in thermal protection systems for space vehicles. In this kind of material, the aerodynamic warming causes a pyrolysis reaction that absorbs heat and results in a char layer, which acts as a thermal insulator against heat conduction and oxygen penetration into the reaction zone. In order to assure the structural integrity of such layer, the pressure distribution of the gas flow from the chemical decomposition of the polymeric material must be estimated. In this work, a reliable model for such estimation is presented and compared with the structural strength of the char layer, which allows determining if the pressure drop is capable to break up that layer.
Keywords
TPS, Composite ablation, pyrolysis, char
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