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# Wall Resolved Fluid-Structure Interaction Numerical Simulation of a Modern Wind Turbine Blade

Lahooti, Mohsen; Puraca, Rudolfo; Carmo, Bruno; Palacios, Rafael; Sherwin, Spencer

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{
"description": "<p>Wall-resolved fluid-structure interaction (FSI) numerical simulations of the NREL 5 MW wind turbine blade<br>\nare compared using two FSI approaches. The first method is based on high-fidelity Nektar++/SHARPy FSI framework,<br>\nwhere the fluid governing equations are solved using high-order spectral/hp element method and the turbulent flow is<br>\nresolved using Large Eddy Simulation (LES) on thick strips, while large-deformation dynamics of the structure are mod-<br>\nelled using a geometrically exact nonlinear composite beam finite-element model. Thick strip method for the fluid reduces<br>\nthe computational cost by considering a series of smaller domains, each of which has a finite thickness in the spanwise<br>\ndirection. Hence, the overall flow over the blade is treated with a sectional approach, where in each of these sections,<br>\nstrips, the 3D flow is reconstructed locally. Tip-loss correction is used to compensate for the sectional approach over the<br>\nblade. The second FSI approach is based on OpenFoam/Calculix coupling, where the second-order unstructured finite<br>\nvolume method approach is used for solving the three-dimensional flow equations and the flow turbulence is captured us-<br>\ning the k-&omega; SST model. The structural dynamics are modeled via second-order finite element method using standard solid<br>\nelements. Effects of the solution fidelity on the prediction of aerodynamic forces as well as on the full three-dimensional<br>\nflow modelling over the blade versus sectional representation of flow over the blade while incorporating the local three-<br>\ndimensionality in each section and tip-correction are discussed. Further, significance of two approaches on modelling<br>\nthe slender blade, one using the beam mode and the other utilizing the full 3D solution of structure is addressed. Finally,<br>\nassessment of computational cost and scalability of the two approaches are presented and discussed.</p>",
"creator": [
{
"affiliation": "Imperial College London",
"@id": "https://orcid.org/0000-0002-9659-7344",
"@type": "Person",
"name": "Lahooti, Mohsen"
},
{
"affiliation": "University of S\u00e3o Paulo",
"@type": "Person",
"name": "Puraca, Rudolfo"
},
{
"affiliation": "University of S\u00e3o Paulo",
"@type": "Person",
"name": "Carmo, Bruno"
},
{
"affiliation": "Imperial College London",
"@type": "Person",
"name": "Palacios, Rafael"
},
{
"affiliation": "Imperial College London",
"@type": "Person",
"name": "Sherwin, Spencer"
}
],
"url": "https://zenodo.org/record/5903368",
"datePublished": "2021-11-22",
"@type": "MediaObject",
"keywords": [
"Fluid-structure interaction, Large Eddy simulation, wind energy, wind turbine blades, aeroelasticity"
],
"@context": "https://schema.org/",
"identifier": "https://doi.org/10.5281/zenodo.5903368",
"@id": "https://doi.org/10.5281/zenodo.5903368",
"workFeatured": {
"url": "https://eventos.abcm.org.br/cobem2021/",
"alternateName": "COBEM",
"@type": "Event",
"name": "COBEM21, 26th International congress of Mechanical Engineering"
},
"name": "Wall Resolved Fluid-Structure Interaction Numerical Simulation of a Modern Wind Turbine Blade"
}
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