Wind turbines in atmospheric flow: fluid–structure interaction simulations with hybrid turbulence modeling
| Autor: | Niels N. Sørensen, Sergio González Horcas, Frederik Zahle, Christian Grinderslev, Niels Troldborg |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Renewable Energy
Sustainability and the Environment Rotor (electric) Turbulence business.industry 020209 energy Turbulence modeling TJ807-830 Energy Engineering and Power Technology 02 engineering and technology Inflow Mechanics Solver Computational fluid dynamics 01 natural sciences Turbine Renewable energy sources 010305 fluids & plasmas law.invention law 0103 physical sciences Fluid–structure interaction 0202 electrical engineering electronic engineering information engineering business |
| Zdroj: | Grinderslev, C, Sørensen, N N, Horcas, S G, Troldborg, N & Zahle, F 2021, ' Wind turbines in atmospheric flow: Fluid-structure interaction simulations with hybrid turbulence modeling ', Wind Energy Science, vol. 6, no. 3, pp. 627-643 . https://doi.org/10.5194/wes-6-627-2021 Wind Energy Science, Vol 6, Pp 627-643 (2021) |
| ISSN: | 2366-7451 |
| Popis: | In order to design future large wind turbines, knowledge is needed about the impact of aero-elasticity on the rotor loads and performance and about the physics of the atmospheric flow surrounding the turbines. The objective of the present work is to study both effects by means of high-fidelity rotor-resolved numerical simulations. In particular, unsteady computational fluid dynamics (CFD) simulations of a 2.3 MW wind turbine are conducted, this rotor being the largest design with relevant experimental data available to the authors. Turbulence is modeled with two different approaches. On one hand, a model using the well-established technique of improved delayed detached eddy simulation (IDDES) is employed. An additional set of simulations relies on a novel hybrid turbulence model, developed within the framework of the present work. It consists of a blend of a large-eddy simulation (LES) model by Deardorff for atmospheric flow and an IDDES model for the separated flow near the rotor geometry. In the same way, the assessment of the influence of the blade flexibility is performed by comparing two different sets of computations. The first group accounts for a structural multi-body dynamics (MBD) model of the blades. The MBD solver was coupled to the CFD solver during run time with a staggered fluid–structure interaction (FSI) scheme. The second set of simulations uses the original rotor geometry, without accounting for any structural deflection. The results of the present work show no significant difference between the IDDES and the hybrid turbulence model. In a similar manner, and due to the fact that the considered rotor was relatively stiff, the loading variation introduced by the blade flexibility was found to be negligible when compared to the influence of inflow turbulence. The simulation method validated here is considered highly relevant for future turbine designs, where the impact of blade elasticity will be significant and the detailed structure of the atmospheric inflow will be important. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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