Helicoidal vortex model for wind turbine aeroelastic simulation

Chattot, Jean‐Jacques

doi:10.1016/j.compstruc.2006.11.013

Cited by 34 publications

(23 citation statements)

References 12 publications

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“…In order to better model the wake dynamics of wind turbine rotors, the vortex model [50], in which the trailing and shed vorticity in the wake are represented by lifting lines or surfaces, has also found applications in the aeroelastic models of wind turbine blades. Fig.…”

Section: Vortex Modelmentioning

confidence: 99%

State of the art in the aeroelasticity of wind turbine blades: Aeroelastic modelling

Wang

Liu

Kolios

2016

Renewable and Sustainable Energy Reviews

161

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With the continuous increasing size and flexibility of large wind turbine blades, aeroelasticity has been becoming a significant subject for wind turbine blade design. There have been some examples of commercially developed wind turbines experiencing aeroelastic instability problems in the last decade, which spokes for the necessity of aeroelastic modelling of wind turbine blades.This paper presents the state-of-the-art aeroelastic modelling of wind turbine blades, provides a comprehensive review on the available models for aerodynamic, structural and cross-sectional analysis, discusses the advantages and disadvantages of these models, and outlines the current implementations in this field. This paper is written for both researchers new to this research field by summarising underlying theory whilst presenting a comprehensive review on the latest studies, and experts in this research field by providing a comprehensive list of relevant references in which the details of modelling approaches can be obtained.

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Section: Vortex Modelmentioning

confidence: 99%

State of the art in the aeroelasticity of wind turbine blades: Aeroelastic modelling

Wang

Liu

Kolios

2016

Renewable and Sustainable Energy Reviews

161

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“…Thickness can be included through source elements but they are of second-order effects on lift and has shown to be negligible when computing loads (Bergami, Gaunaa, & Heinz, 2013). In order to enable the solution to be written in a linear statespace representation, the wake is prescribed in a helicoidal shape (Chattot, 2007) as shown in Figure 2. The chordwise length of the shed wake vortex rings from trailing-edge is U ∞ × ∆t, where the relative freestream velocity U ∞ varies linearly along the span of the blade.…”

Section: State-space Vortex Unsteady Aerodynamicsmentioning

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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“…For the aerodynamics model, vortex panels are placed on the outer 80% span of the blade and a helicoidal wake profile 42 is prescribed to enable a linear UVLM representation, as shown in Figure 7. The inboard segment of the blade with cylindrical cross-sections is not modeled here but can be included as additional drag forces.…”

mentioning

confidence: 99%

Model-based Aeroservoelastic Design and Load Alleviation of Large Wind Turbines

Hesse

Palacios

et al. 2014

32nd ASME Wind Energy Symposium

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This paper presents an aeroservoelastic modeling approach for dynamic load alleviation in large wind turbines with trailing-edge aerodynamic surfaces. The tower, potentially on a moving base, and the rotating blades are modeled using geometrically non-linear composite beams, which are linearized around reference conditions with arbitrarily-large structural displacements. Time-domain aerodynamics are given by a linearized 3-D unsteady vortexlattice method and the resulting dynamic aeroelastic model is written in a state-space formulation suitable for model reductions and control synthesis. A linear model of a single blade is used to design a Linear-Quadratic-Gaussian regulator on its root-bending moments, which is finally shown to provide load reductions of about 20% in closed-loop on the full wind turbine non-linear aeroelastic model.

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Helicoidal vortex model for wind turbine aeroelastic simulation

Cited by 34 publications

References 12 publications

State of the art in the aeroelasticity of wind turbine blades: Aeroelastic modelling

State of the art in the aeroelasticity of wind turbine blades: Aeroelastic modelling

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

Model-based Aeroservoelastic Design and Load Alleviation of Large Wind Turbines

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