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- W2322126611 abstract "Large Eddy Simulations are used to explore the unsteady jet-in-crossflow interactions arising from discrete hole film cooling from a cylindrical hole. The numerical grids are created using GridPro and exported into OpenFOAM for solution with specified initial and boundary conditions. A recycling-rescaling technique is used to generate a realistic turbulent incoming boundary layer upstream of injection. The geometry and flow conditions are specified to match conditions of an experiment in open literature for robust validation of the numerical solution and turbulence modeling. While LES has been demonstrated to be very successful in free shear flows, wallbounded flows remain a hot topic of research. The current study tests the ability of LES in predicting film cooling flows using detailed experimental measurements. The LES results compared favorably with the experimental data except in areas close to the injection site and close to the wall. Grid resolution is discussed in terms of the percent turbulent kinetic energy resolved and related to the success of the LES predictions in different regions of the jet. With a dynamic Smagorinsky model used for the subgrid turbulent stresses, the benefit of a dynamic procedure for the subgrid turbulent heat fluxes instead of a supplied constant Prandtl number is minimal at the current grid resolution. The trajectories, spreading rates and large turbulent structures of the jet are discussed in terms of the hydrodynamic parameters such as velocity ratio and momentum ratio." @default.
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- W2322126611 date "2012-06-25" @default.
- W2322126611 modified "2023-10-05" @default.
- W2322126611 title "Large Eddy Simulations of the Hydrodynamic and Thermal Fields from a Cylindrical Film Cooling Hole" @default.
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- W2322126611 doi "https://doi.org/10.2514/6.2012-3311" @default.
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