Wind Turbine Aerodynamic Performanceby Lifting Line Method

Dumitrescu, Horia; Cardoş, Vladimir

doi:10.1155/s1023621x98000128

Cited by 17 publications

(10 citation statements)

References 3 publications

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“…Kim et al [7] have used the same method to simulate the blade-tower interaction over the NREL Phase VI and additionally used the nonlinear vortex correction method to investigate the rotor turbine while considering wind shear, yaw influence, distance from blade to tower, and different tower dimensions. The lifting lines model was used by Dumitrescu and Cardos [8] to simulate HAWTs, and the results obtained by using a nonlinear iterative prescribed wake analysis were more accurate than the results calculated by the free wake model. More accurate simulations can be achieved by employing flow simulation methods such as Reynolds Averaged Navier-Stokes Equation (RANSE) solvers with an accompanying turbulence model.…”

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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“…As for the future work, a rotor model will be introduced to the filament based solution with a criterion to handle instability. Lifting line based rotor models are currently being investigated for this purpose 18 . This will place proper boundary and initial conditions to ensure the accuracy of the filament based simulations.…”

Section: Discussionmentioning

confidence: 99%

A Novel Vortex Method to Investigate Wind Turbine Near-Wake Characteristics

Premaratne

2017

35th AIAA Applied Aerodynamics Conference

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We utilize vortex methods to identify possible mechanisms which cause vortex filaments to break-up in the wake behind a horizontal axis wind turbine (HAWT). This study was inspired by the flow characteristics observed in PIV measurements from an experiment conducted at the Atmospheric Boundary Layer (ABL) tunnel at ISU using a scaled model of an industry standard HAWT. Measurements revealed the presence of a tip vortex filament and a secondary vortex filament emanating from the mid-span location of the blade. The mid-span vortex has twice the circulation of the tip vortex filament and the vortices break-up at X/D = 0.5 axial station. Both filaments showed expansion with the wake and a merging effect between the filaments. Our investigation using a vortex-blob based method (2D) and a filament based method (3D) captured wake expansion of both filaments as well as the converging behavior, which could result in wake instability.Downloaded by Hui Hu on July 24, 2017 | http://arc.aiaa.org |

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“…The model has to be applicable to the study of high roughness on the blades (in particular, to be able to take into account biofouling). The lifting line theory method (LLTM) uses Kutta and Joukowski's conditions on finite sections to compute the circulation around the blade and deduces its performance [15]. Vortex filaments are used to model the wake.…”

Section: Introductionmentioning

confidence: 99%

3D Simulation with Flow-Induced Rotation for Non-Deformable Tidal Turbines

Robin

Bennis

Dauvin

2021

JMSE

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The overall potential for recoverable tidal energy depends partly on the tidal turbine technologies used. One of problematic points is the minimum flow velocity required to set the rotor into motion. The novelty of the paper is the setup of an innovative method to model the fluid–structure interactions on tidal turbines. The first part of this work aimed at validating the numerical model for classical cases of rotation (forced rotation), in particular, with the help of a mesh convergence study. Once the model was independent from the mesh, the numerical results were tested against experimental data for both vertical and horizontal tidal turbines. The results show that a good correspondence for power and drag coefficients was observed. In the wake, the vortexes were well captured. Then, the fluid drive code was implemented. The results correspond to the expected physical behavior. Both turbines rotated in the correct direction with a coherent acceleration. This study shows the fundamental operating differences between a horizontal and a vertical axis tidal turbine. The lack of experiments with the free rotation speed of the tidal turbines is a limitation, and a digital brake could be implemented to overcome this difficulty.

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Wind Turbine Aerodynamic Performanceby Lifting Line Method

Cited by 17 publications

References 3 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

A Novel Vortex Method to Investigate Wind Turbine Near-Wake Characteristics

3D Simulation with Flow-Induced Rotation for Non-Deformable Tidal Turbines

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