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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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{
"publisher": "Zenodo",
"DOI": "10.5281/zenodo.5903368",
"title": "Wall Resolved Fluid-Structure Interaction Numerical Simulation of a Modern Wind Turbine Blade",
"issued": {
"date-parts": [
[
2021,
11,
22
]
]
},
"abstract": "<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>",
"author": [
{
"family": "Lahooti, Mohsen"
},
{
"family": "Puraca, Rudolfo"
},
{
"family": "Carmo, Bruno"
},
{
"family": "Palacios, Rafael"
},
{
"family": "Sherwin, Spencer"
}
],
"id": "5903368",
"note": "Video of my presentatin at COBEM 21",
"type": "motion_picture",
"event": "COBEM21, 26th International congress of Mechanical Engineering (COBEM)"
}
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