Consistent 3D CFD and BEM simulations of a research turbine considering rotational augmentation

Guma, Giorgia; Bangga, Galih; Jost, Eva; Lutz, Thorsten; Krämer, Ewald

doi:10.1088/1742-6596/1037/2/022024

Cited by 11 publications

(12 citation statements)

References 8 publications

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“…Schneider et al [25] documented that the polar data extracted from the 3D CFD simulation of a 7.5 MW wind turbine enhanced the BEM prediction significantly. A similar conclusion was obtained very recently by Guma et al [26] for a 750 kW research turbine. They observed that the origin of the polars is a crucial input that can make strong difference in the results.…”

Section: Motivation and State Of The Artsupporting

confidence: 90%

Comparison of Blade Element Method and CFD Simulations of a 10 MW Wind Turbine

Bangga

2018

Fluids

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The present studies deliver the computational investigations of a 10 MW turbine with a diameter of 205.8 m developed within the framework of the AVATAR (Advanced Aerodynamic Tools for Large Rotors) project. The simulations were carried out using two methods with different fidelity levels, namely the computational fluid dynamics (CFD) and blade element and momentum (BEM) approaches. For this purpose, a new BEM code namely B-GO was developed employing several correction terms and three different polar and spatial interpolation options. Several flow conditions were considered in the simulations, ranging from the design condition to the off-design condition where massive flow separation takes place, challenging the validity of the BEM approach. An excellent agreement is obtained between the BEM computations and the 3D CFD results for all blade regions, even when massive flow separation occurs on the blade inboard area. The results demonstrate that the selection of the polar data can influence the accuracy of the BEM results significantly, where the 3D polar datasets extracted from the CFD simulations are considered the best. The BEM prediction depends on the interpolation order and the blade segment discretization.

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Section: Motivation and State Of The Artsupporting

confidence: 90%

Comparison of Blade Element Method and CFD Simulations of a 10 MW Wind Turbine

Bangga

2018

Fluids

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“…In this case, the blade needs to be modeled aerodynamically with as many nodes as structurally, i.e., 21 for each blade. Polars have been extracted from 3D CFD calculations in order to avoid the use of any tip or hub correction model and ensure as much consistency as possible to the CFD calculations, as it was already shown in Guma et al (2018). The 3D polars have been provided in a range of angles of attack (AOAs) of between around −30 and +30 • and have been extracted from the CFD solution using the RAV method (Rahimi et al, 2018) and then extrapolated up to −180 to +180 • using the Viterna method.…”

Section: Bem Modelmentioning

confidence: 99%

Aeroelastic analysis of wind turbines under turbulent inflow conditions

et al. 2021

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Abstract. The aeroelastic response of a 2 MW NM80 turbine with a rotor diameter of 80 m and interaction phenomena are investigated by the use of a high-fidelity model. A time-accurate unsteady fluid–structure interaction (FSI) coupling is used between a computational fluid dynamics (CFD) code for the aerodynamic response and a multi-body simulation (MBS) code for the structural response. Different CFD models of the same turbine with increasing complexity and technical details are coupled to the same MBS model in order to identify the impact of the different modeling approaches. The influence of the blade and tower flexibility and of the inflow turbulence is analyzed starting from a specific case of the DANAERO experiment, where a comparison with experimental data is given. A wider range of uniform inflow velocities are investigated by the use of a blade element momentum (BEM) aerodynamic model. Lastly a fatigue analysis is performed from load signals in order to identify the most damaging load cycles and the fatigue ratio between the different models, showing that a highly turbulent inflow has a larger impact than flexibility, when low inflow velocities are considered. The results without the injection of turbulence are also discussed and compared to the ones provided by the BEM code AeroDyn.

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“…These are not considered in a two-dimensional (2D) presentation of the blade, see Hansen et al (2006) and Syed Ahmed Kabir and Ng (2017) for more details. It is possible to obtain the 3D airfoil data by CFD approaches for use by the BEM, see, for instance, Du and Selig (1998), Du and Selig (2000), and Guma et al (2018). Another limitation of BEM method is that the effect of the adjacent elements is neglected.…”

Section: Low-fidelity Methodsmentioning

confidence: 99%

On motion analysis and elastic response of floating offshore wind turbines

Lamei

Hayatdavoodi

2020

J. Ocean Eng. Mar. Energy

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Wind energy industry is expanded to offshore and deep water sites, primarily due to the stronger and more consistent wind fields. Floating offshore wind turbine (FOWT) concepts involve new engineering and scientific challenges. A combination of waves, current, and wind loads impact the structures. Often under extreme cases, and sometimes in operational conditions, magnitudes of these loads are comparable with each other. The loads and responses may be large, and simultaneous consideration of the combined environmental loads on the response of the structure is essential. Moreover, FOWTs are often large structures and the load frequencies are comparable to the structural frequencies. This requires a fluid-structure-fluid elastic analysis which adds to the complexity of the problem. Here, we present a critical review of the existing approaches that are used to (i) estimate the hydrodynamic and aerodynamic loads on FOWTs, and (ii) to determine the structures' motion and elastic responses due to the combined loads. Particular attention is given to the coupling of the loads and responses, assumptions made under each of the existing solution approaches, their limitations, and restrictions, where possible, suggestions are provided on areas where further studies are required.

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Consistent 3D CFD and BEM simulations of a research turbine considering rotational augmentation

Cited by 11 publications

References 8 publications

Comparison of Blade Element Method and CFD Simulations of a 10 MW Wind Turbine

Comparison of Blade Element Method and CFD Simulations of a 10 MW Wind Turbine

Aeroelastic analysis of wind turbines under turbulent inflow conditions

On motion analysis and elastic response of floating offshore wind turbines

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