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The first part of this work describes the validation of a wind turbine farm Computational Fluid Dynamics (CFD) simulation using literature velocity wake data from the MEXICO (Model Experiments in Controlled Conditions) experiment. The work is intended to...
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Rafael V. Rodrigues and Corinne Lengsfeld
The first part of this work describes the validation of a wind turbine farm Computational Fluid Dynamics (CFD) simulation using literature velocity wake data from the MEXICO (Model Experiments in Controlled Conditions) experiment. The work is intended to...
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Javier López-Queija, Eider Robles, Jose Ignacio Llorente, Imanol Touzon and Joseba López-Mendia
Currently, floating offshore wind is experiencing rapid development towards a commercial scale. However, the research to design new control strategies requires numerical models of low computational cost accounting for the most relevant dynamics. In this ...
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Martin Geibel and Galih Bangga
Data driven approaches are utilized for optimal sensor placement as well as for velocity prediction of wind turbine wakes. In this work, several methods are investigated for suitability in the clustering analysis and for predicting the time history of th...
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Qiang Wang, Kangping Liao and Qingwei Ma
This research has certain reference significance for improved wind turbine performance. It can also provide reference value for wind shear related study.
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Alejandro Ballesteros-Coll, Unai Fernandez-Gamiz, Iñigo Aramendia, Ekaitz Zulueta and José Antonio Ramos-Hernanz
Microtabs (MTs) are a regularly used flow control device in terms of wind turbine optimization. The present study introduces the application of the novel cell-set model for an MT implementation on a DU91W(2)250 airfoil. The cell-set model is based on the...
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Alejandro Ballesteros-Coll, Unai Fernandez-Gamiz, Iñigo Aramendia, Ekaitz Zulueta and Jose Manuel Lopez-Guede
Over the last few years, the advances in size and weight for wind turbines have led to the development of flow control devices. The current work presents an innovative method to model flow control devices based on a cell-set model, such as Gurney flaps (...
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Wei Zhong, Wen Zhong Shen, Tong Guang Wang and Wei Jun Zhu
The angle of attack (AoA) is the key parameter when extracting the aerodynamic polar from the rotating blade sections of a wind turbine. However, the determination of AoA is not straightforward using computational fluid dynamics (CFD) or measurement. Sin...
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Jing Dong, Axelle Viré, Carlos Simao Ferreira, Zhangrui Li and Gerard van Bussel
A modified free-wake vortex ring model is proposed to compute the dynamics of a floating horizontal-axis wind turbine, which is divided into two parts. The near wake model uses a blade bound vortex model and trailed vortex model, which is developed based...
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Iñigo Aramendia, Unai Fernandez-Gamiz, Ekaitz Zulueta, Aitor Saenz-Aguirre and Daniel Teso-Fz-Betoño
The growth in size and weight of wind turbines over the last years has led to the development of flow control devices, such as Gurney flaps (GFs). In the current work, a parametric study is presented to find the optimal GF length to improve the airfoil a...
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Wei Zhong, Tong Guang Wang, Wei Jun Zhu and Wen Zhong Shen
The Actuator Disc/Navier-Stokes (AD/NS) method has played a significant role in wind farm simulations. It is based on the assumption that the flow is azimuthally uniform in the rotor plane, and thus, requires a tip loss correction to take into account th...
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Ying Guo, Liqin Liu, Xifeng Gao and Wanhai Xu
Aerodynamics and motion performance of the floating vertical wind turbine (VAWT) were studied in this paper, where the wind turbine was H-type and the floating foundation was truss spar type. Based on the double-multiple-stream-tube theory, the formulae ...
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Francesco Castellani, Davide Astolfi, Matteo Becchetti, Francesco Berno, Filippo Cianetti and Alessandro Cetrini
Micro-wind turbines are energy conversion technologies strongly affected by fatigue, as a result of their size and the variability of loads, induced by the unsteady wind conditions, and modulated by a very high rotational speed. This work is devoted to t...
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Unai Fernandez-Gamiz, Ekaitz Zulueta, Ana Boyano, Josean A. Ramos-Hernanz and Jose Manuel Lopez-Guede
Microtabs (MT) consist of a small tab placed on the airfoil surface close to the trailing edge and perpendicular to the surface. A study to find the optimal position to improve airfoil aerodynamic performance is presented. Therefore, a parametric study o...
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Francesc Pozo and Yolanda Vidal
This paper addresses the problem of online fault detection of an advanced wind turbine benchmark under actuators (pitch and torque) and sensors (pitch angle measurement) faults of different type: fixed value, gain factor, offset and changed dynamics. The...
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Iván Herráez, Bernhard Stoevesandt and Joachim Peinke
Rotational effects are known to influence severely the aerodynamic performance of the inboard region of rotor blades. The underlying physical mechanisms are however far from being well understood. The present work addresses this problem using Reynolds av...
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Andrew Shires and Velissarios Kourkoulis
The blades of a vertical axis wind turbine (VAWT) rotor see an inconsistent angle of attack through its rotation. Consequently, VAWT blades generally use symmetrical aerofoils with a lower lift-to-drag ratio than cambered aerofoils tailored to maximise h...
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Kai Wang, Tianhui Liu, Yuanchen Wan, Muk Chen Ong and Tiecheng Wu
Improving power output and reducing costs are crucial to the sustainable development of offshore wind power. In the present study, a dual-rotor wind turbine (DRWT) is proposed to improve wind energy capture efficiency by adding an auxiliary rotor behind ...
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Xiaolei Yang, Daniel Foti, Christopher Kelley, David Maniaci and Fotis Sotiropoulos
Subscale wind turbines can be installed in the field for the development of wind technologies, for which the blade aerodynamics can be designed in a way similar to that of a full-scale wind turbine. However, it is not clear whether the wake of a subscale...
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