The European project ATLLAS "Aerodynamic and Thermal Load Interactions with Lightweight Advanced Materials for High Speed Flight" has the objective to identify and assess lightweight advanced materials which can withstand ultra high temperatures and heat fluxes enabling high-speed flight above Mach 3. One major topic addresses the case of ceramic materials (CMC) for combustion chambers. Despite the high temperature resistance, they shall need active cooling either convective or by transpiration. As the CMC materials are porous, transpiration cooling is very effective in cooling the sample. The present work focuses on transpiration through a porous medium and is investigated with a multi-physics CFD code.
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