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The influence of incoming turbulence on the dynamic modes of an NREL-5MW wind turbine wake
- Source :
- Renewable Energy, Renewable Energy, 2022, 183, pp.601-616. ⟨10.1016/j.renene.2021.11.037⟩, Renewable Energy, Elsevier, 2022, 183, pp.601-616. ⟨10.1016/j.renene.2021.11.037⟩
- Publication Year :
- 2022
-
Abstract
- International audience; Knowledge of the dynamics of wind turbine wakes and its dependence on the incoming boundary layer is fundamental to optimize and control the power production of wind farms. This work aims at investigating the effect of inflow turbulence on the wake of the NREL-5MW wind turbine. Sparsity-Promoting Dynamic Mode Decomposition (SP-DMD) is performed on snapshots extracted from large-eddy simulations of the turbine wake, for detecting the most dynamically-relevant flow structures in the presence or absence of inflow turbulence. We demonstrate that inflow turbulence generated by a precursor simulation radically changes the most dynamically-relevant flow structures. For the laminar-inflow case the DMD modes selected by the SP algorithm have high wavenumbers and are spatially localized. When turbulence is added at the inflow, these high-frequency modes are superseded by low-frequency modes lying in the frequency range of the wake meandering and filling the whole domain, mostly corresponding to those dynamically relevant for the precursor simulation. These results show that, in the presence of inflow turbulence, coherent structures linked to endogenous mechanisms such as tip and root vortices loose their dynamical relevance in favour of those exogenously excited by turbulence, indicating that low-dimensional models of turbine wakes should take into account atmospheric turbulence.
- Subjects :
- NREL 5MW wind turbine
020209 energy
Flow (psychology)
02 engineering and technology
Inflow
Wake
01 natural sciences
7. Clean energy
Turbine
010305 fluids & plasmas
[SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Physics::Fluid Dynamics
DMD modes
Turbulent precursor simulation
Uniform or turbulent inflow
0103 physical sciences
0202 electrical engineering, electronic engineering, information engineering
Dynamic mode decomposition
Physics
Renewable Energy, Sustainability and the Environment
Turbulence
Mechanics
Vortex
Boundary layer
[SPI.MECA.STRU]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Structural mechanics [physics.class-ph]
Physics::Space Physics
Subjects
Details
- Language :
- English
- ISSN :
- 09601481 and 18790682
- Database :
- OpenAIRE
- Journal :
- Renewable Energy, Renewable Energy, 2022, 183, pp.601-616. ⟨10.1016/j.renene.2021.11.037⟩, Renewable Energy, Elsevier, 2022, 183, pp.601-616. ⟨10.1016/j.renene.2021.11.037⟩
- Accession number :
- edsair.doi.dedup.....d201a1af78bf694f9b4a60f9b1b4ddfd