Couplage aéro-thermo-mécanique pour la prédiction de la déformation d'une plaque soumise à une flamme

Abstract : This thesis consists in setting up an external fluid-thermal-structural coupling, based on a partitionned scheme, between the research codes CEDRE (fluid mechanics, finite volumes) and Z-set (independent solvers for structural mechanics and heat transfer through the solid). The numerical results are compared with experimental data, to study a complex problem related to the aerospace certification process: the flame-wall interaction. This phenomenon is is driven by the heat flux generated by the flame close to the wall. Because of the disparity of thermal characteristic times between the fluid and the solid, the aero-thermal part of the coupling is simplified by considering the fluid as a sequence of steady states. The heating of the metallic plate causes its deformation (the material has a viscoplastic behavior). The displacement of the fluid-structure interface is propagated through the fluid mesh. Based on similitudes between impinging reacting jets (flames) and non-reacting jets, coupled computations are performed in 2D and 3D configurations with an equivalent non-reacting hot jet.
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Bénédicte Baqué. Couplage aéro-thermo-mécanique pour la prédiction de la déformation d'une plaque soumise à une flamme. Autre. Ecole Nationale Supérieure des Mines de Paris, 2012. Français. ⟨NNT : 2012ENMP0013⟩. ⟨pastel-00718738⟩

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