Communication Dans Un Congrès Année : 2024

Large-Eddy Simulation of solid/fluid heat and mass transfer applied to the thermal degradation of composite material for fire certification applications

Résumé

With the current trend towards improved aircraft efficiency, carbon fiber reinforced polymers (CFRP) have increasingly been used for both fuselage and nacelle’s fairing. A critical part of the design phase remains the fire certification of current and future components. Current international standards, such as the FAR25.856(b):2003 and ISO2685:1998(e), ensure the thermal resistance of these materials when submitted to high-heat loads. Still, certification test campaigns are costly and often require a long time for their set-up. The introduction of novel numerical tools for the prediction of the degraded material properties could improve the design process by providing supplementary inputs. For the past decades, Large-Eddy Simulation (LES) has become a valuable tool for the simulation of unsteady reactive flows. Several Conjugate Heat-Transfer (CHT) approaches have been performed to address the unsteady interactions between a fluid and a solid solver [1]. These efforts have allowed to estimate the impact of the flame on the temperature distribution of solid geometries. However, the number of studies addressing the interaction of a flame leading to the degradation of a composite material is limited [2]. As a matter of fact, the resolution of this type of physics requires in-depth knowledge of the material's behavior over a wide range of temperatures. Properties such as the spatial arrangement of the different constituents have a major impact on heat conduction and therefore on degradation kinetics triggered at higher temperatures. In the present paper, a framework for the simulation of fire certification test under realistic conditions is presented. In relies on the coupling between a fluid, radiation and a solid solver, capable of respectively solving for the reactive, radiative heat losses and the thermal degradation of a composite material.

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Dates et versions

hal-04948737 , version 1 (14-02-2025)

Identifiants

  • HAL Id : hal-04948737 , version 1

Citer

Vincent Moureau, Roxane Letournel, Kévin Bioche, Nicolas Dellinger, Adrien Grenouilloux. Large-Eddy Simulation of solid/fluid heat and mass transfer applied to the thermal degradation of composite material for fire certification applications. INCA 2024 - Initiative Nationale en Combustion Avancée, Nov 2024, Marseille, France. ⟨hal-04948737⟩
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