Wang, Lin, Liu, Xiongwei, Renevier, Nathalie, Stables, Matthew and Hall, George M. (2014) Nonlinear aeroelastic modelling for wind turbine blades based on blade element momentum theory and geometrically exact beam theory. Energy, 76 . pp. 487-501. ISSN 03605442
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Official URL: http://dx.doi.org/10.1016/j.energy.2014.08.046
Due to the increasing size and flexibility of large wind turbine blades, accurate and reliable aeroelastic modelling is playing an important role for the design of large wind turbines. Most existing aeroelastic models are linear models based on assumption of small blade deflections. This assumption is not valid anymore for very flexible blade design because such blades often experience large deflections. In this paper, a novel nonlinear aeroelastic model for large wind turbine blades has been developed by combining BEM (blade element momentum) theory and mixed-form formulation of GEBT (geometrically exact beam theory). The nonlinear aeroelastic model takes account of large blade deflections and thus greatly improves the accuracy of aeroelastic analysis of wind turbine blades. The nonlinear aeroelastic model is implemented in COMSOL Multiphysics and validated with a series of benchmark calculation tests. The results show that good agreement is achieved when compared with experimental data, and its capability of handling large deflections is demonstrated. Finally the nonlinear aeroelastic model is applied to aeroelastic modelling of the parked WindPACT 1.5 MW baseline wind turbine, and reduced flapwise deflection from the nonlinear aeroelastic model is observed compared to the linear aeroelastic code FAST (Fatigue, Aerodynamics, Structures, and Turbulence).
|Uncontrolled Keywords (separate with ;):||Wind turbine blade; Nonlinear; Aeroelastic model; Large blade deflections; BEM (Blade element momentum); GEBT (Geometrically exact beam theory)|
|Schools:||Faculty of Science and Technology > School of Engineering|
|Deposited By:||Paul Harrison|
|Deposited On:||13 May 2015 13:10|
|Last Modified:||20 Oct 2016 15:52|
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