Investigating Aeroelastic Performance of Multi-Mega Watt Wind Turbine Rotors Using CFD

Corson, David; Griffith, D. Todd; Ashwill, T.D.; Shakib, Farzin

doi:10.2514/6.2012-1827

Cited by 17 publications

(21 citation statements)

References 13 publications

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“…CFD/CSD coupled studies for wind turbines are also available. Corson et al [13] performed coupled fluidestructure interaction (FSI) simulations for a 13.2 MW blade design using the commercial CFD solver AcuSolve and the MBD solver FAST. Bazilevs et al [14] proposed an FSI procedure for wind turbine simulations using a FEM based CFD solver and a structural solver based on the isogeometric rotation-free KirchohoffeLove composite shell and the bending strip method.…”

Section: Introductionmentioning

confidence: 99%

Coupled multi-body dynamics and CFD for wind turbine simulation including explicit wind turbulence

et al. 2015

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a b s t r a c tA high fidelity approach for wind turbine aero-elastic simulations including explicit representation of the atmospheric wind turbulence is presented. The approach uses a dynamic overset computational fluid dynamics (CFD) code for the aerodynamics coupled with a multi-body dynamics (MBD) code for the motion responses to the aerodynamic loads. Mann's wind turbulence model was implemented into the CFD code as boundary and initial conditions. The wind turbulence model was validated by comparing the theoretical one-point spectrum for the three components of the velocity fluctuations, and by comparing the expected statistics from the CFD simulated wind turbulent field with the explicit wind turbulence inlet boundary from Mann model. Extensive simulations based on the proposed coupled approach were conducted with the conceptual NREL 5-MW offshore wind turbine in an increasing level of complexity, analyzing the turbine behavior as elasticity, wind shear and atmospheric wind turbulence are added to the simulations. Results are compared with the publicly available simulations results from OC3 participants, showing good agreement for the aerodynamic loads and blade tip deflections in time and frequency domains. Wind turbulence/turbine interaction was examined for the wake flow. It was found that explicit turbulence addition results in considerably increased wake diffusion. The coupled CFD/MBD approach can be extended to include multibody models of the shaft, bearings, gearbox and generator, resulting in a promising tool for wind turbine design under complex operational environments.

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Section: Introductionmentioning

confidence: 99%

Coupled multi-body dynamics and CFD for wind turbine simulation including explicit wind turbulence

et al. 2015

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“…The performance predictions are compared with those of Corson et al 3 Wind turbine airfoil sections are often designed to maintain laminar flow at low angles of attack. Consequently, using traditional turbulence models without a transition model can result in an overprediction of viscous drag.…”

Section: Introductionmentioning

confidence: 99%

“…The AcuSolve simulations also revealed a weak dependence of predictions on whether the blade was treated as rigid or flexible. Though Corson et al 3 performed a full CFD simulation of the Sandia 100-m blade, the focus of their study was primarily on blade structural loadings instead of the flowfield generated by the blade.…”

Section: Introductionmentioning

confidence: 99%

“…The article reviews several lowand high-fidelity methods to evaluate the aerodynamic and structural loads on wind turbine blades, along with a discussion on the coupling between the two loads in terms of possible instabilities. Corson et al 3 performed fullycoupled CFD-CSD simulations on the Sandia 100-m blade using a commercially available finite-element flow solver, AcuSolve. The results were compared to predictions by two NREL design tools, FAST and WTPerf.…”

Section: Introductionmentioning

confidence: 99%

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RANS Simulations of Sandia 100-m Wind Turbine Blade: Effect of Leading-Edge Tubercles

Reinhart

Medida

Kalra

et al. 2014

32nd AIAA Applied Aerodynamics Conference

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3-D RANS simulations of theSandia 100 meter reference blade are performed for a range of wind speeds using the Spalart-Allmaras turbulence model. Furthermore, hybrid RANS/LES simulations are run using the OVERTURNS CFD solver with the SpalartAllmaras turbulence model incorporating both the γ -Re θt -SA transition model as well as a Delayed Detached Eddy Simulation formulation. Simulations for the reference blade are compared with predictions by Corson et al. to assess the performance of the γ -Re θt -SA transition model for wind turbine applications as well as to understand underlying flow physics. A modified blade design, with leading edge tubercles at the tip, is also explored to make sure that the performance effects are minimal for on-design conditions.

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“…Attempts have been made by several researchers to include viscosity and flow separation (Sørensen, 1983;Voutsinas, 2006), however there are still unresolved issues related to convergence (Hansen et al, 2006). With advances in computing power, computational fluid dynamics (CFD) solving the Navier-Stokes equations are also increasingly being used (Corson, Griffith, Ashwill, & Shakib, 2012;Simms, Schreck, Hand, & Fingersh, 2001).…”

Section: Introductionmentioning

confidence: 99%

Model-based aeroelastic analysis and blade load alleviation of offshore wind turbines

Palacios

Graham

2015

International Journal of Control

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Offshore wind turbines take advantage of the vast energy resource in open waters but face structuralintegrity challenges specific to their operating environment that require cost-effective load alleviation solutions. This paper introduces a computational methodology for model-based two and three-dimensional design of load alleviation systems on offshore wind turbines. The aero-hydro-servoelastic model is formulated in a convenient state-space representation, coupling a multi-body composite beam description of the main structural elements with unsteady vortex-lattice aerodynamics and Morison's description of the hydrodynamics. The aerodynamics does not require empirical corrections and focuses on a controloriented approach to the modelling. Numerical results show that through trailing-edge flaps actuated by a robust controller, more than 60% reduction in dynamic loading due to atmospheric turbulence can be achieved for the sectional model and close to 13% reduction in blade loads are obtained for the complete three-dimensional floating turbine.

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Investigating Aeroelastic Performance of Multi-Mega Watt Wind Turbine Rotors Using CFD

Cited by 17 publications

References 13 publications

Coupled multi-body dynamics and CFD for wind turbine simulation including explicit wind turbulence

Coupled multi-body dynamics and CFD for wind turbine simulation including explicit wind turbulence

RANS Simulations of Sandia 100-m Wind Turbine Blade: Effect of Leading-Edge Tubercles

Model-based aeroelastic analysis and blade load alleviation of offshore wind turbines

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