Numerical simulations of the aerodynamic behavior of large horizontal-axis wind turbines

Gebhardt, Cristian Guillermo; Preidikman, Sergio; Massa, Julio C.

doi:10.1016/j.ijhydene.2009.12.089

Cited by 32 publications

(24 citation statements)

References 4 publications

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“…A three-dimensional panel method was also used by Bermúdez et al [5] for simulating the aerodynamic behaviour of horizontal-axis wind turbines, and the comparison between experimental data and the computed results with the panel method shows a good agreement. Gebhardt et al [6] utilized the vortex-lattice method to simulate the unsteady aerodynamic behaviour of large horizontal-axis wind turbines. The aerodynamic of the blade-tower interaction has been satisfactorily captured as well as the effects of land surface and the boundary layer of the inflow.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Unsteady Flow Behaviour on a Wind Turbine Using a BEM and a RANSE Method

Alesbe

Abdel‐Maksoud

Aljabair

2016

Journal of Renewable Energy

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Analyses of the unsteady flow behaviour of a 5 MW horizontal-axis wind turbine (HAWT) rotor (Case I) and a rotor with tower (Case II) are carried out using a panel method and a RANSE method. The panel method calculations are obtained by applying the in-house boundary element method (BEM) panMARE code, which is based on the potential flow theory. The BEM is a three-dimensional first-order panel method which can be used for investigating various steady and unsteady flow problems. Viscous flow simulations are carried out by using the RANSE solver ANSYS CFX 14.5. The results of Case I allow for the calculation of the global integral values of the torque and the thrust and include detailed information on the local flow field, such as the pressure distribution on the blade sections and the streamlines. The calculated pressure distribution by the BEM is compared with the corresponding values obtained by the RANSE solver. The tower geometry is considered in the simulation in Case II, so the unsteady forces due to the interaction between the tower and the rotor blades can be calculated. The application of viscous and inviscid flow methods to predict the forces on the HAWT allows for the evaluation of the viscous effects on the calculated HAWT flows.

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Section: Introductionmentioning

confidence: 99%

Investigation of the Unsteady Flow Behaviour on a Wind Turbine Using a BEM and a RANSE Method

Alesbe

Abdel‐Maksoud

Aljabair

2016

Journal of Renewable Energy

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“…In this study, the tower of the wind turbine was neglected to minimize the complexity of the geometry. In fact, its presence does not have a great effect on the aerodynamic performances of the rotor as mentioned by Gebhardt et al (2010). The considered configuration is shown in Fig.…”

Section: Computational Flow Field and Meshing Domainmentioning

confidence: 99%

Kelvin Waves Structure Analysis of a Horizontal Axis Wind Turbine Tip Vortices

Oueslati

Dahmouni

Nasrallah

2020

JAFM

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The optimization of the wind energy conversion is one of the most important domains which was widely interested researchers. The instabilities in the wind turbine wake are one of the sources of energy loss which strongly influenced the helical tube vortex structure and are generally difficult to be quantified using experimental facilities. This paper presents a numerical investigation on the wake downstream of a horizontal axis wind turbine (HAWT) model using the Fluent software. Results were validated using experimental measurements conducted in the CRTEn wind tunnel. The Kelvin wave's theory was, also, used to analyze the deformations acting on the tip vortices. The cartography of the velocity gradient tensor components of the first tip vortex and the different families of Kelvin wave's were studied and classified according to the azimuth wavenumber. The obtained results confirm that the tip vortices meandering correspond to the helical mode of Kelvin wave's and the stretching-compression phenomenon is the most important deformation acting on the tip vortex tubes during the development of HAWT wake.

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“…By using an extended version of the UVLM developed by Gebhardt et al [14], we estimate the magnitude and evolution of the aerodynamic loads in the time domain. This version allows considering the presence of both, the tower and the land-surface boundary layer.…”

Section: Aerodynamic Loadsmentioning

confidence: 99%

Non-linear aeroelastic behavior of large horizontal-axis wind turbines: A multibody system approach

Gebhardt¹,

Preidikman²,

Jørgensen³

et al. 2012

International Journal of Hydrogen Energy

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a b s t r a c tIn this paper, we present the development of a rigid-flexible multibody model which, coupled with an existing aerodynamic model, is used to numerically simulate the non-linear aeroelastic behavior of large horizontal-axis wind turbines. The model is rather general, different configurations could be easily simulated though it is primarily intended to be used as a research tool to investigate influences of different dynamic aspects. It includes: i) a supporting tower; ii) a nacelle which contains the electricity generator, the power electronics and the control systems; iii) a hub, where the blades are fixed, connected to the generator rotating shaft; and, iv) three blades which extract energy from the airstream.The blades are considered flexible, and their equations of motion are discretized in space domain by using beam finite elements capable of taking into account the nonlinearities coming from the kinematics. The tower is also considered flexible, but its equations of motion are discretized by using the method of assumed-modes. The nacelle and hub are considered rigid, and their equations of motion take into account the effects of the kinematic non-linearities. Due to the system complexity, the tower, nacelle and hub are modeled as a single kinematic chain and each blade is modeled separately. Constraint equations are used to connect the blades to the hub. The resulting governing equations are differential-algebraic, and these are numerically and interactively solved in the time domain by using a fourth order predictor-corrector scheme.The results help to understand the wind speed influence on: i) the rotor angular speed;ii) the after-forward and side-to-side displacements of the tower; and, iii) the flap-and edge-wise displacements of the blades.

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Numerical simulations of the aerodynamic behavior of large horizontal-axis wind turbines

Cited by 32 publications

References 4 publications

Investigation of the Unsteady Flow Behaviour on a Wind Turbine Using a BEM and a RANSE Method

Investigation of the Unsteady Flow Behaviour on a Wind Turbine Using a BEM and a RANSE Method

Kelvin Waves Structure Analysis of a Horizontal Axis Wind Turbine Tip Vortices

Non-linear aeroelastic behavior of large horizontal-axis wind turbines: A multibody system approach

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