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Languages: French
Types: Article
Subjects: Couplage aérothermique, Instationnaire, Conservativité, Analyse de stabilité, Vérification et validation, Jet en écoulement transverse, Transfert de chaleur conjugué, 621.042
Une méthodologie destinée à la simulation des phénomènes aérothermiques instationnaires est développée, étudiée et validée dans ce travail. Elle consiste à coupler deux solveurs de dynamique des fluides et de thermique du solide. Elle est étudiée selon des critères de conservativité, précision et robustesse. Les paramètres du couplage (conditions limites d’interface fluide / solide et correction conservative) sont définis pour assurer la stabilité et un minimum de développements au sein des codes couplés. Une validation expérimentale est également effectuée sur une configuration proche des conditions moteurs d’avion. L'expérience modélise le refroidissement des carters en phase transitoire. Un jet accélérant en écoulement transversal refroidit une plaque plane épaisse chauffée en face arrière. La comparaison des résultats numériques et expérimentaux est encourageante. A methodology for simulation of transient conjugate heat transfer is presented, studied and validated in this thesis. The method consists in the coupling of fluid dynamics and thermics solvers. Criteria for the study of this method are conservativity, accuracy and robustness. Coupling parameters (boundary conditions at the fluid / solid interface and conservative correction) are defined to ensure stability and as few developments as possible in the coupled solvers. An experimental validation is also defined and made. The configuration is characteritic of jet engines conditions. The experiment is a simplified model of carter cooling by air jets. An accelerating jet in crossflow cools a thick flat plate heated on its rear face. Comparison of numerical and experimental results is encouraging.
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