Comparison of BEM and CFD results for MEXICO rotor aerodynamics

Gallardo, Borja Plaza; Bardera, Rafael; Visiedo, Sergio

doi:10.1016/j.jweia.2015.05.005

Cited by 68 publications

(46 citation statements)

References 6 publications

(6 reference statements)

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“…However, over-estimate was depicted by k − Realizable model at 15 m/s and k − at 20 m/s. Authors in [32,34] also made similar observations of lower accuracy at the suction surface than at the pressure surface. The accuracy is influenced by separation of flow that occurs on suction surface causing the turbulent air.…”

Section: Pressure Distributionmentioning

confidence: 67%

A comparative study of RANS-based turbulence models for an upscale wind turbine blade

2019

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Computational fluid dynamic (CFD) numerical simulations are providing alternative to experimental methods in preliminary analysis of aerodynamic behavior for large wind turbines. Shortcomings inherent by experimental methods have popularized the three dimensional CFD methods. This paper, therefore, presents a numerical analysis for NREL 5MW wind turbine rotor using a single moving reference frame approach. ANSYS Fluent is employed to model airflow over the blade's surfaces using Reynolds average Navier-Stokes equations. A steady-state incompressible pressure based solver is applied in form of absolute velocity formulation. Four turbulence models are used: k − SST, k − RNG, k − realizable and Spalart Allmaras to determine the aerodynamic torque. Mesh independence study and validation is also performed. In addition, the predicted flap-wise bending load and comparison of pressure distribution for the four turbulence models are evaluated at different sections of the blade. Due to absence of experimental data for employed blade model, the obtained aerodynamic torque was compared with other reliable numerical simulation results.

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Section: Pressure Distributionmentioning

confidence: 67%

A comparative study of RANS-based turbulence models for an upscale wind turbine blade

2019

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“…Neither the RANS nor the DES results agree with the measured dynamic data, they both give much larger predictions and wider loops. The reason of these differences is still not well determined, but they may be related to the blade design and a special aerodynamic behaviour at this particular spanwise station, where a mid-span vortex exists [35]. This requires further investigations.…”

Section: Dynamic Stallmentioning

confidence: 92%

“…However, when it comes to the 60% span location, the agreements of both RANS and DES results with the measured data are deteriorated. The reason for this still remains open, but it may relate to the three-dimensional vortex shedding phenomenon at this particular mid-span section due to the blade design [35]. The lift and drag characteristics of the three sections extracted from the simulations have been compared with the 2D case provided by Mexnext MEXICO project [7][8][9][10].…”

Section: Dynamic Stallmentioning

confidence: 99%

Comparative Study of the Aerodynamic Performance of the New MEXICO Rotor under Yaw Conditions

2018

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Abstract:The influence of yaw misalignment on the aerodynamic performance of the New MEXICO rotor is investigated using blade-resolved Computational Fluid Dynamics (CFD) approaches with three wind speeds considered at a fixed yaw angle of 30 degrees. The air-load predictions and near wake characteristics from the numerical results are compared and discussed against the most recent wind tunnel test data. The nacelle impact, dynamic stall phenomenon and wake characteristics are analyzed, demonstrating the yaw effects and numerical issues raised from Reynolds-Averaged Navier Stokes (RANS) and Detached Eddy Simulation (DES) computations.

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“…Suzan investigated radical regenerations in HAWT blade construction. Velázquez et al, learned the construction and experiments of a 1-MW HAWT [13][14][15][16][17][18]. One could apply the study of blade design and optimization techniques on small wind-turbine rotor performance.…”

Section: Introductionmentioning

confidence: 99%

Dimensional Analysis of Power Prediction of a Real-Scale Wind Turbine Based on Wind-Tunnel Torque Measurement of Small-Scaled Models

2018

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A preliminary study of a horizontal-axis wind turbine (HAWT) design is carried out using a wind tunnel to obtain its aerodynamic characteristics. Utilization of data from the study to develop large-scale wind turbines requires further study. This paper aims to discuss the use of wind turbine data obtained the wind-tunnel measurements to estimate the characteristics of wind turbines that have field size. One should measure the torque of two small-scale turbines inside the wind tunnel. The first small-scale turbine has a radius of 0.14 m, and the radius of the second small turbine is 0.19 m. Torque measurement results from both turbines were analyzed using the Buckingham π theorem to obtain a correlation between torsion and diameter variations. The obtained correlation equation was used to estimate the field measurement of turbine power with a radius of 1.2 m. The resulting correlation equation can be applied to approximate the energy generated by the turbine using the size of the field well in the operating area and the tip-speed ratio (λ) of the turbine design.

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Comparison of BEM and CFD results for MEXICO rotor aerodynamics

Cited by 68 publications

References 6 publications

A comparative study of RANS-based turbulence models for an upscale wind turbine blade

A comparative study of RANS-based turbulence models for an upscale wind turbine blade

Comparative Study of the Aerodynamic Performance of the New MEXICO Rotor under Yaw Conditions

Dimensional Analysis of Power Prediction of a Real-Scale Wind Turbine Based on Wind-Tunnel Torque Measurement of Small-Scaled Models

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