Detailed Modeling of Cork-Phenolic Ablators in Preparation for the Post-flight Analysis of the QARMAN Re-entry CubeSat
| Autor: | Thierry Magin, Pierre Schrooyen, Claudio Miccoli, Domenic D'Ambrosio, Alessandro Turchi |
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| Rok vydání: | 2021 |
| Předmět: |
020301 aerospace & aeronautics
Hypersonic Aerodynamics Thermal Protection System Ablation Ablative heat shield business.industry Computer science Finite difference method Ablative heat shield 02 engineering and technology Ablation Computational fluid dynamics Solver Thermal Protection System 020303 mechanical engineering & transports 0203 mechanical engineering Discontinuous Galerkin method Atmospheric entry Space Shuttle thermal protection system Heat shield Fluid dynamics Pharmacology (medical) Aerospace engineering Hypersonic Aerodynamics business |
| Zdroj: | Aerotecnica Missili & Spazio. 100:207-224 |
| ISSN: | 2524-6968 0365-7442 |
| Popis: | This work deals with the analysis of the cork P50, an ablative thermal protection material (TPM) used for the heat shield of the qarman Re-entry CubeSat. Developed for the European Space Agency (ESA) at the von Karman Institute (VKI) for Fluid Dynamics, qarman is a scientific demonstrator for Aerothermodynamic Research. The ability to model and predict the atypical behavior of the new cork-based materials is considered a critical research topic. Therefore, this work is motivated by the need to develop a numerical model able to respond to this demand, in preparation to the post-flight analysis of qarman. This study is focused on the main thermal response phenomena of the cork P50: pyrolysis and swelling. Pyrolysis was analyzed by means of the multi-physics Computational Fluid Dynamics (CFD) code argo, developed at Cenaero. Based on a unified flow-material solver, the Volume Averaged Navier–Stokes (VANS) equations were numerically solved to describe the interaction between a multi-species high enthalpy flow and a reactive porous medium, by means of a high-order Discontinuous Galerkin Method (DGM). Specifically, an accurate method to compute the pyrolysis production rate was implemented. The modeling of swelling was the most ambitious task, requiring the development of a physical model accounting for this phenomenon, for the purpose of a future implementation within argo. A 1D model was proposed, mainly based on an a priori assumption on the swelling velocity and the resolution of a nonlinear advection equation, by means of a Finite Difference Method (FDM). Once developed, the model was successfully tested through a matlab code, showing that the approach is promising and thus opening the way to further developments. |
| Databáze: | OpenAIRE |
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