Influence of Wake Effects and Inflow Turbulence on Wind Turbine Loads

Kecskemety, Krista M.; McNamara, Jack J.

doi:10.2514/1.j051095

Cited by 26 publications

(20 citation statements)

References 22 publications

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“…In Ref. 26, which demonstrated excellent agreement with the lift distribution from the NREL Unsteady Aerodynamics Experiment Phase VI, the lift coefficient was modeled according to thin airfoil theory as 2πα. However, standard practice is to use data from 2D wind tunnel experiments, extrapolated from -180 • to 180 • and corrected for rotational augmentation using the NREL AirfoilPrep code.…”

Section: Iiib Lift Distribution Predictionmentioning

confidence: 95%

“…Following Ref. 26, this was carried out using the wind turbine configurations and operating conditions defined in Tables 1 and 2. A side view of the wake geometry computed for the configuration in Table 1 using the FAST-FVW model is compared with both experimental 31 steady Aerodynamics Experiment Phase VI 32 wind turbine described in Table 2.…”

Section: Iiia Verification and Validation Of Wake Geometrymentioning

confidence: 99%

“…The stand-alone FVW model from Ref. 26, which were computed using the free wake model with an assumed sectional lift coefficient of 2πα, is also included for comparison to further verify the incorporation of the FVW model into FAST. In addition, the NRMSE and L ∞ errors for the FAST-FVW, FAST-BEM, and CFD are compared in Tables 4 and 5 .…”

Section: Iiib Lift Distribution Predictionmentioning

confidence: 99%

“…Comparisons with experimental data demonstrated that the developed time-marching free wake model was numerically stable and provided good to excellent predictions of the wake geometry and induced loads. Based on the model developed by Gupta and Leishman,4,19, 20 a FVW model was recently developed by the authors 26 for incorporation into the NREL FAST code. Preliminary verification and validation results demonstrated good to excellent agreement with experimental and computational results in terms of wake geometry and blade lift.…”

Section: Introductionmentioning

confidence: 99%

“…Preliminary verification and validation results demonstrated good to excellent agreement with experimental and computational results in terms of wake geometry and blade lift. 26 This paper is focused on both the integration of the previously developed FVW model in the NREL FAST code, and a comprehensive validation. Additionally, comparisons of the load predictions using different aerodynamic modeling approaches, e.g., BEM, free vortex wake, and CFD will be presented.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Validation of an Enhanced Aeroelastic Analysis Code for Wind Turbines

Kecskemety¹,

McNamara²

2012

53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference

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Wind turbines are currently a rapidly expanding form of renewable energy. However, there are numerous technological challenges that must be overcome before wind energy provides a significant amount of power in the United States. One of the primary challenges in wind turbine design and analysis is accurately accounting for the aerodynamic environment. This study is focused on a comprehensive verification and validation of the NREL FAST code, which has been enhanced to include a free vortex wake model. The verification and validation is carried out through a comparison of wake geometry, blade lift distribution, wind turbine power and force and moment coefficients using a combination of CFD and experimental data. The results are also compared against Blade Element Momentum Theory, and results from a 2001 double-blind NREL study on the prediction capabilities of wind turbine modeling tools. Results indicate that the enhanced aeroelastic code generally provides improved predictions. However, in several notable cases the predictions are only marginally improved, or even worse, than those generated using Blade Element Momentum Theory aerodynamics. It is concluded that modeling of the aerodynamic environment remains incomplete, even after inclusion of wake effects. One important aspect identified is modeling of the unsteady aerodynamic lift characteristics of the rotor.

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Section: Iiib Lift Distribution Predictionmentioning
confidence: 95%

Section: Iiia Verification and Validation Of Wake Geometrymentioning
confidence: 99%

Section: Iiib Lift Distribution Predictionmentioning
confidence: 99%

Section: Introductionmentioning
confidence: 99%

See 3 more Smart Citations
Validation of an Enhanced Aeroelastic Analysis Code for Wind Turbines
Kecskemety¹,
McNamara²
2012
53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference
0
0
0
0
View full text Add to dashboard Cite
Wind turbines are currently a rapidly expanding form of renewable energy. However, there are numerous technological challenges that must be overcome before wind energy provides a significant amount of power in the United States. One of the primary challenges in wind turbine design and analysis is accurately accounting for the aerodynamic environment. This study is focused on a comprehensive verification and validation of the NREL FAST code, which has been enhanced to include a free vortex wake model. The verification and validation is carried out through a comparison of wake geometry, blade lift distribution, wind turbine power and force and moment coefficients using a combination of CFD and experimental data. The results are also compared against Blade Element Momentum Theory, and results from a 2001 double-blind NREL study on the prediction capabilities of wind turbine modeling tools. Results indicate that the enhanced aeroelastic code generally provides improved predictions. However, in several notable cases the predictions are only marginally improved, or even worse, than those generated using Blade Element Momentum Theory aerodynamics. It is concluded that modeling of the aerodynamic environment remains incomplete, even after inclusion of wake effects. One important aspect identified is modeling of the unsteady aerodynamic lift characteristics of the rotor.
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Effects of inflow turbulence on structural response of wind turbine blades
Gao
¹
,
Yang
²
,
Abraham
³

et al. 2020
Journal of Wind Engineering and Industrial Aerodynamics
20
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5
0
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Influence of wake dynamics on the performance and aeroelasticity of wind turbines
Kecskemety
¹
,
McNamara
²

2016
Renewable Energy
18
0
9
0
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Influence of Wake Effects and Inflow Turbulence on Wind Turbine Loads

Cited by 26 publications

References 22 publications

Validation of an Enhanced Aeroelastic Analysis Code for Wind Turbines

Validation of an Enhanced Aeroelastic Analysis Code for Wind Turbines

Effects of inflow turbulence on structural response of wind turbine blades

Influence of wake dynamics on the performance and aeroelasticity of wind turbines

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