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Title: Implicit Large Eddy Simulations of a Large-Radius Leading Edge VFE-2 Delta Wing
Authors: Dzanic, Tarik
Advisors: Martinelli, Luigi
Department: Mechanical and Aerospace Engineering
Class Year: 2018
Abstract: Wall-resolved higher-order implicit Large Eddy Simulations were carried out on a large-radius leading edge VFE-2 delta wing at a Reynolds number of 60,000 with the Flux Reconstruction approach of the GPU-accelerated solver PyFR. The results of fourth-order accurate spatial and temporal schemes without explicit turbulence modeling were compared to lower-order Reynolds-Averaged Navier-Stokes methods with the Menter SST turbulence model. The results highlighted the excessive numerical dissipation introduced by lower-order RANS methods and their inability to accurately capture small-scale flow phenomena such as secondary and tertiary vortices. Analysis of the Reynolds stress components of the ILES solution provided a framework for tuning the parameters of Reynolds Stress Equation Models and showed that the isotropic assumption of closure models for RANS and Detached Eddy Simulation methods was ill-posed for the given problem. Underresolved ILES was performed at a Reynolds number of 600,000 and the results were shown along with RANS, but further sampling of the ILES flow field was required before the results can be compared.
Type of Material: Princeton University Senior Theses
Language: en
Appears in Collections:Mechanical and Aerospace Engineering, 1924-2019

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