Assessment of load reduction capabilities using passive and active control methods on a 10MW-scale wind turbine

Manolas, Dimitris I.; Serafeim, Giannis P.; Chaviaropoulos, P.; Riziotis, Vasilis A.; Voutsinas, Spyros G.

doi:10.1088/1742-6596/1037/3/032042

Cited by 10 publications

(7 citation statements)

References 12 publications

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“…In the present study, simulations of the IEC 61400-1 [20] design load case DLC-1.3 (extreme turbulence wind conditions in normal operation) at the wind speed of 13m/s and 25m/s are performed. Earlier studies have shown [2], [3], [11] that the above DLCs are the driving DLCs for the ultimate loads of the reference rotor. It is important to note that rationalization of the computational cost is absolutely critical at this point.…”

Section: Dtu-10mw Rwt Properties and Cost Analysismentioning

confidence: 92%

“…In the present study, BTC [9], [10], [11] (Figure 1) has been applied to the rotor of the DTU-10MW RWT, which has been thereafter aerodynamically and structurally re-optimized. Within the applied optimization loop the blade length, planform, thickness of inner structure walls and the offset angle of the composite material plies have been considered as design variables.…”

Section: Introductionmentioning

confidence: 99%

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Multidisciplinary aeroelastic optimization of a 10MW-scale wind turbine rotor targeting to reduced LCoE

Serafeim¹,

Manolas²,

Riziotis³

et al. 2022

J. Phys.: Conf. Ser.

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In the present paper, multidisciplinary optimization (MDAO) is applied with the aim to reduce the levelized cost of energy (LCoE) of the DTU-10MW Reference Wind Turbine (RWT) rotor. As application paradigm, the widely applied in the literature passive load control method of Bend Twist Coupling (BTC) is considered. The integrated optimization framework combines in a common loop, rotor aerodynamic and full wind turbine structural elasto-dynamic analyses, aiming at determining the optimum rotor diameter, the planform of the blade in terms of twist and chord distributions, the offset ply angle for BTC and the inner structure of the blade with cost function directly the LCoE. It is based on an in-house servo-aero-elastic analysis tool for determining the ultimate loads along the span of the blades and the power yield, whereas a cross-sectional analysis tool is employed for acquiring structural properties of the modified blade and stresses distributions over the blade sections. A cost model of the overall wind turbine is implemented by combining existing in the literature models and open data. The new rotor design is found to have a reduced LCoE by 0.71% and to produce 2.4% higher energy annually due to its increased by 3.7% diameter.

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Section: Dtu-10mw Rwt Properties and Cost Analysismentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Multidisciplinary aeroelastic optimization of a 10MW-scale wind turbine rotor targeting to reduced LCoE

Serafeim¹,

Manolas²,

Riziotis³

et al. 2022

J. Phys.: Conf. Ser.

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show abstract

“…Thus, there could be significant in-plane and out-of-plane deformations due to the aeroelastic loads. In addition, there is an increasing interest in the backward swept blades because of the possibility to achieve passive load alleviation with geometric bend-twist coupling (Liebst, 1986;Zuteck, 2002;Larwood and Zutek, 2006;Larwood et al, 2014;Manolas et al, 2018). The recent research by Barlas et al (2021) is on the aeroelastic design optimization of blade tip add-ons with curved shapes.…”

Section: Introductionmentioning

confidence: 99%

A computationally efficient engineering aerodynamic model for swept wind turbine blades

Pirrung

Gaunaa

et al. 2022

Wind Energ. Sci.

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Abstract. In this work, a computationally efficient engineering model for the aerodynamics of swept wind turbine blades is proposed for the extended blade element momentum (BEM) formulation. The model is modified based on a coupled near- and far-wake model, in which the near wake is assumed to be the first quarter revolution of the non-expanding helical wake of the own blade. For the special case of in-plane trailed vorticity, the original empirical equations determining the steady-state value of the near-wake induction are replaced by the analytical results, which are in the form of incomplete elliptic integrals. For the general condition of helical trailed vorticities, the steady-state near-wake induction is approximated based on the results of the special conditions and a correction factor. The factor is calculated using empirical equations with influence coefficient tensors, to minimize the computational effort. These influence coefficient tensors are pre-calculated and are fitted to the results from the numerical integration of the Biot–Savart law. With the indicial function approach, it is not necessary to explicitly save the information of the vorticities that were trailed in the previous time steps. This engineering approach is a combination of analytical results and numerical approximations, with low and constant computational effort for each time step. The proposed model is practically applicable to time-marching aero-servo-elastic simulations. The results of the swept blades with uniform inflow perpendicular to the rotor calculated from the proposed model are compared with the results from a BEM code, a lifting-line solver and a Navier–Stokes solver. The significantly improved agreement with the higher-fidelity models compared to the BEM method highlights the performance of the proposed method.

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Section: Introductionmentioning

confidence: 99%

A computationally efficient engineering aerodynamic model for swept wind turbine blades

Pirrung

Gaunaa

et al. 2021

Preprint

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Abstract. In this work, a computationally efficient engineering model for the aerodynamics of swept wind turbine blades is proposed for the extended blade element momentum (BEM) formulation. The model is modified based on a coupled near- and far-wake model, in which the near-wake is assumed to be the first quarter revolution of the non-expanding helical wake of the own blade. For the special case of in-plane trailed vorticity, the original empirical equations determining the steady-state value of the near-wake induction are replaced by the analytical results, which are in the form of incomplete elliptic integrals. For the general condition of helical trailed vorticities, the steady-state near-wake induction is approximated based on the results of the special conditions and a correction factor. The factor is calculated using empirical equations with influence coefficient tensors, to minimize the computational efforts. These influence coefficient tensors are pre-calculated and are fitted to the results from the numerical integration of the Biot-Savart law. With the indicial function approach, it is not necessary to explicitly save the information of the vorticities that were trailed in the previous time steps. This engineering approach is a combination of analytical results and numerical approximations, with low and constant computational effort for each time step. The proposed model is practically applicable to time-marching aero-servo-elastic simulations. The results of the swept blades with uniform inflow perpendicular to the rotor calculated from the proposed model are compared with the results from a BEM code, a lifting-line solver as well as a Navier-Stokes solver. The significantly improved agreement with the higher-fidelity models compared to the BEM method highlights the performance of the proposed method.

show abstract

Assessment of load reduction capabilities using passive and active control methods on a 10MW-scale wind turbine

Cited by 10 publications

References 12 publications

Multidisciplinary aeroelastic optimization of a 10MW-scale wind turbine rotor targeting to reduced LCoE

Multidisciplinary aeroelastic optimization of a 10MW-scale wind turbine rotor targeting to reduced LCoE

A computationally efficient engineering aerodynamic model for swept wind turbine blades

A computationally efficient engineering aerodynamic model for swept wind turbine blades

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