The proposed work corresponds to a comprehensive comparison of aerothermal flow field arising from the heat dissipation of aircraft equipment. Laboratory experiments based on real-scale geometry were conducted to fully depict heat transfer between the fluid and the equipment. In some particular regions of interest, temperature profiles in the sub-layer have been directly measured up to the wall in order to estimate convective heat transfer coefficient. This way of measurement is very challenging in such configuration representative of powerplant environment in terms of geometry, Reynolds number and temperature. In parallel, a Large Eddy Simulation coupled to a thermal solver were carried and compared to experimental data allowing a cross-validation of simulations and experiments. A simulation verification methodology based on the turbulent energy spectra decay is proposed in order to ensure result accuracy for such aerothermal problems.

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