3D Navier–Stokes computations of a stall‐regulated wind turbine

Pape, Arnaud Le; Lecanu, J.

doi:10.1002/we.129

Cited by 120 publications

(71 citation statements)

References 13 publications

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“…In particular, the considered operating point revealed a blade shedding frequency corresponding to the fifth harmonic. This harmonic order is coherent with the results of previous CFD computations of the NREL Phase VI (Le Pape and Lecanu 2004;Li 2014). Regarding the blade-tower alignment event, loads fluctuation relative amplitudes of 1 % for the rotor thrust and 2 % for the mechanical power were computed.…”

Section: Discussionsupporting

confidence: 89%

CFD Study of DTU 10 MW RWT Aeroelasticity and Rotor-Tower Interactions

et al. 2016

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A numerical analysis of the DTU 10 MW RWT wind turbine aerodynamics is presented in this work. The development of an innovative methodology based on three-dimensional computational fluid dynamics allowed to tackle two challenging problems related to this application. On one hand, the impact of blade deflections on rotor performance was assessed in a rotor-only context. Different blade configurations were studied, including the installation of Gurney flaps and the consideration of prebending and preconing. On the other hand, flow unsteadiness of the full machine (i.e. including the tower) was modeled by means of the Non-Linear Harmonic method. This approach allowed to characterize local aspects of the flow and the impact of rotor-tower interactions on the computed loads.

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Section: Discussionsupporting

confidence: 89%

CFD Study of DTU 10 MW RWT Aeroelasticity and Rotor-Tower Interactions

et al. 2016

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“…The turbulence in the boundary layer is modelled by means of the k − ω shear-stress transport (SST) model proposed by Menter (1993). This model has been proved to be suitable for the simulation of wind turbine blades (Bechmann et al, 2011;Johansen and Sørensen, 2004;Le Pape and Lecanu, 2004;Sørensen et al, 2002). However, the implicit assumption of fully turbulent flow might be a source of uncertainty since the existence of laminar-to-turbulent transition can not be completely ruled out.…”

Section: Numerical Methods and Computational Meshmentioning

confidence: 99%

“…The hub and nacelle geometries are disregarded in order to keep the mesh as simple as possible. This approach, which is based on the assumption that the hub and nacelle do not influence substantially the blade root flow, is usually followed when structured meshes are used for simulating wind turbine blades (Johansen et al, 2002;Sørensen et al, 2002;Le Pape and Lecanu, 2004;Schreck et al, 2007;Bechmann et al, 2011). The mesh exploits the symmetry of the rotor by modelling only one half of it and using periodic boundary conditions.…”

Section: Numerical Methods and Computational Meshmentioning

confidence: 99%

Detailed analysis of the blade root flow of a horizontal axis wind turbine

et al. 2016

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Abstract. The root flow of wind turbine blades is subjected to complex physical mechanisms that influence significantly the rotor aerodynamic performance. Spanwise flows, the Himmelskamp effect, and the formation of the root vortex are examples of interrelated aerodynamic phenomena that take place in the blade root region. In this study we address those phenomena by means of particle image velocimetry (PIV) measurements and Reynolds-averaged Navier-Stokes (RANS) simulations. The numerical results obtained in this study are in very good agreement with the experiments and unveil the details of the intricate root flow. The Himmelskamp effect is shown to delay the stall onset and to enhance the lift force coefficient C l even at moderate angles of attack. This improvement in the aerodynamic performance occurs in spite of the negative influence of the mentioned effect on the suction peak of the involved blade sections. The results also show that the vortex emanating from the spanwise position of maximum chord length rotates in the opposite direction to the root vortex, which affects the wake evolution. Furthermore, the aerodynamic losses in the root region are demonstrated to take place much more gradually than at the tip.

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“…He showed significant differences in lift behaviour only at the station farthest inboard on the blade. In Other experimental and numerical studies, Tangler (2004) Le Pape and Lecanu (2004) assumed that 3D effects yield delayed stall (separation nearer the trailing edge for a rotational airfoil) with Cl higher than 2D near the blade root location. Timmer and van Rooij (2003) showed that after stall, the values of Cl and Cd depends on the airfoil's leading edge thickness.…”

Section: Literature Surveymentioning

confidence: 99%

Analysis of horizontal axis wind turbine blade using CFD

Nigam¹,

Tenguria²,

Pradhan³

2017

Int. J. Eng. Sci. Tech

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Blade is very essential part of HAWT (horizontal axis wind turbine). Forces for Lift and drag on the blade has an important role in the wind turbine performance. The main purpose of this work is to perform CFD analysis of a blade and airfoil of wind turbine using k- SST model. In this present study NACA 63 4 -221 airfoil profile is taken for the modeling and then analysis of the blade. The lift and drag forces are calculated for the blade at different AOA (angle of attack). For present work the blade length is taken 38.98 meter, which is a redesigned blade for VESTAS V82-1.65MW horizontal axis wind turbine blade. Results obtained from simulation are compared with the experimental work found in literature.

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3D Navier–Stokes computations of a stall‐regulated wind turbine

Cited by 120 publications

References 13 publications

CFD Study of DTU 10 MW RWT Aeroelasticity and Rotor-Tower Interactions

CFD Study of DTU 10 MW RWT Aeroelasticity and Rotor-Tower Interactions

Detailed analysis of the blade root flow of a horizontal axis wind turbine

Analysis of horizontal axis wind turbine blade using CFD

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