Dynamic Stall Modeling for Wind Turbines

Modern wind turbines frequently operate at off-design conditions during their life cycle. They undergo dynamic loads characterized by unsteady aerodynamics. Predicting these unsteady aerodynamic loads has been very difficult due to the non-linear nature of unsteady aerodynamics. Especially when operating near the stall region, these turbine are...

fastFoam - An aero-servo-elastic wind turbine simulation method based on CFD

The current wind turbine design tools are based on aerodynamic simulations using blade element momentum (BEM) codes to calculate loads and power, see for instance the tools HAWC2, Bladed or FAST. This engineering method is computationally efficient, but theoretically valid only for steady two dimensional flow in non-yawed conditions. <br/><br/...

Definition and Response Validation of a Simplified Aero-Servo-Elastic Wind Turbine Model

Currently, the foundation design of offshore wind turbines is based on a simple cantilever beam model with a mass representing the rotor and nacelle, or by making use of wind turbine simulation software such as Bladed, which are built for rotor design. The simple models are unrealistic since the dynamic interaction between the aerodynamic loads,...

Development of Advanced Model of Radar and Communication Signals Scattering on Wind Turbines

In the recent years, there has been an increase in the popularity of renewable energy sources. One such being the wind energy. With the development in the field of wind energy, the structure of the wind turbines (WT) has also increased. The huge wind turbine structure (WTS) and the wind farms, both offshore and onshore, has a strong impact on...

Optimization of a wind turbine blade-root connection

For several years T-bolts have been a popular choice for joints in the field of wind energy, specifically for connecting the blade roots to the hub of the wind turbine. Their use is mandated by the geometry of the joint and they perform very well under pure axial loading. However recent analyses have shown significant bending stresses in the T...

Evaluation of gearbox and direct drive wind turbines: An application of the technology dominance theory combined with the Best-Worst-Method to assess the effect of factors for technology dominance on the technology dominance process of wind turbines

Power generation is at the forefront of a transition from fossil fuel to renewable energy sources (RES). Wind energy is a promising technology with rapid developments and the installed base of wind turbines is continuously increasing. Currently, the majority of the installed wind turbines can be categorised under the direct drive wind turbine...