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Algorithmes de couplage aérothermique pour des applications turbomachines

Abstract : For some configurations, especially in high-pressure turbines, the thermal aspect for aerodynamic performances is essential. The need to have an exit total temperature flowing out the combustion chamber, i.e flowing in the high-pressure turbine, higher and higher leads engine manufacturers to reduce uncertainties on the thermal environment of turbine blades, cooled or not. It is therefore important to use a coupled approach for aerothermal simulations in turbomachinery applications. The main purpose of this work focuses on: (i) finding the right strategy for coupling, both robuste and precise, espacially for stabilizing correctly the fluid-solid interface with the right boundary condition, (ii) studying the impact of heat fluxes on aerodynamic performences and finally (iii) extending this coupling method to include unsteady flows. Thus the method developped in this work has led to an unconditionnal stability of the coupling process while having raisonnable compute times.
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Submitted on : Monday, September 21, 2020 - 2:44:14 PM
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Rami Salem. Algorithmes de couplage aérothermique pour des applications turbomachines. Mécanique des fluides [physics.class-ph]. Université Paris-Saclay, 2020. Français. ⟨NNT : 2020UPASC035⟩. ⟨tel-02944470⟩

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