Numerical simulation of unsteady aerodynamics effects in horizontal-axis wind turbines

Bermudez, Luis; Velázquez, A.; Matesanz, A.

doi:10.1016/s0038-092x(99)00056-0

Cited by 19 publications

(10 citation statements)

References 13 publications

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“…The results show the ability of the applied panel method to provide detailed information on the pressure and velocity distributions over the blade surface as compared with other applied approaches. 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.…”

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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“…These reports touch upon the relevant research carried out by the participants in the tasks and they include extensive literature lists. A large part of these lists are added to this article, where the references Shipley, Miller, Robinson, Luttges, and Simms (), Hansen (), van Rooij, Timmer, and Bruining (), Acker and Hand (), Bermudez, Velasquez, and Matesanz (), Bjorck (), Bruining (), Chaviaropoulos et al (), Duque, van Dam, and Hughes (), Feigl (), Graham & Brown, , Leclerc and Masson (), Maeda and Schepers (), Miller et al (), Schepers (), Schepers, Feigl, Van Rooij, and Bruining (), Schepers and van Rooij (), Schreck, Robinson, Hand, and Simms (), Simms, Robinson, Hand, and Fingersh (), Snel (), Strzelczyk (, ), van Rooij (, ), van Rooij, Bruining, and Schepers (), and van Rooij and Schepers () are related to IEA tasks 14/18.…”

Section: Aerodynamic Measurements: Results and Progressmentioning

confidence: 99%

Aerodynamic measurements on wind turbines

Schepers

Schreck

2018

WIREs Energy & Environment

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This article reviews the aerodynamic measurement programs on wind turbines that have been performed in the last decades. It is largely based on results from four projects carried out under auspices of the International Energy Agency (IEA), which are denoted as IEA Tasks 14, 18, 20, and 29. The aim of these projects was to collect and analyze aerodynamic measurements on five field facilities (IEA Tasks 14 and 18), the National Renewable Energy Laboratory Phase VI turbine placed in the large NASA Ames wind tunnel (IEA Task 20), and the Mexico turbine placed in the Large Low Speed Facility of the German Dutch Wind tunnel DNW (IEA Task 29). Other experimental programs with an important aerodynamic content are touched upon as well. Research areas for which these measurements have led to important progress are identified. The progress is illustrated with analyses on these experiments. It is shown that detailed aerodynamic measurements are an absolute necessity for the validation and improvement of wind turbine design codes, where it is also concluded that the amount of measurement data which has been produced until now is still far too limited. This article is categorized under: Wind Power > Science and Materials

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“…Their results show that RANS calculations correlate well with experimental data. Bemudez et al [5] studied both steady and unsteady aerodynamic effects for a HAWT for different variables such as air velocity (magnitude and direction) and rotor yaw. Ebert and Wood [6] showed that CFD results were very close to experimental data.…”

Section: Itm Web Of Conferencesmentioning

confidence: 99%

Comparison between OpenFOAM CFD & BEM theory for variable speed – variable pitch HAWT

ElQatary

Elhadidi

2014

ITM Web of Conferences

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Abstract.OpenFoam is used to compare computational fluid dynamics (CFD) with blade element momentum theory (BEM) for a variable speed -variable pitch HAWT (Horizontal Axis Wind Turbine). The wind turbine is first designed using the BEM to determine the blade chord, twist and operating conditions. The wind turbine blade has an outer diameter of 14 m, uses a NACA 63-415 profile for the entire blade and root to tip twist distribution of 15 deg ( Figure 3). The RPM varies from 20-75 for freestream velocities varying between 3-10.5 m/s (variable speed) and a constant RPM of 78.78 for velocities ranging between 11-25 m/s (variable pitch). OpenFOAM is used to investigate the wind turbine performance at several operating points including cut-in wind speed (3 m/s), rated wind speed (10.5 m/s) and in the variable pitch zone. Simulation results show that in the variable-speed operating range, both CFD and BEM compare reasonably well. This agreement can be attributed to the fact that the complex three-dimensional flow around the turbine blades can be split into two radial segments. For radii less than the mid-span, the flow is three-dimensional, whereas for radii greater than the mid-span, the flow is approximately two-dimensional. Since the majority of the power is produced from sections beyond the mid-span, the agreement between CFD and BEM is reasonable. For the variable-pitch operating range the CFD results and BEM deviate considerably. In this case the majority of the power is produced from the inner sections in which the flow is three-dimensional and can no longer be predicted by the BEM. The results show that differences in pitch angles up to 10 deg can result to regulate the power for high wind speeds in the variable-pitch operation zone.

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Numerical simulation of unsteady aerodynamics effects in horizontal-axis wind turbines

Cited by 19 publications

References 13 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

Aerodynamic measurements on wind turbines

Comparison between OpenFOAM CFD & BEM theory for variable speed – variable pitch HAWT

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