In the context of ForWind we work in close collaboration with the groups Energymeteorology, TWIST (Turbulence, Windenergy und Stochastics) and Windenergysystems from University Oldenburg, as well as with external collaboration partners. Our current research topics comprise the subjects listed below.
We investigate the influence of the atmospheric flow conditions onto a wind turbine. In this context, we simulate the interaction of the atmosheric flow and the wind turbines. In order to gain a deeper understanding of the behavior of wind turbines, we extend existing so-called micrometeorological methods. The picture shows the different modeling approaches for wind turbine in the simulation. Besides the influence of atmospheric conditions onto the loads at a wind turbine, the effect of a wind turbines onto the surrounding atmospheric flow plays a major role. In this context, we investigate the influence of a whole wind farm onto the flow.
We analyse power fluctuations in wind farms. These are in close relation to fluctuations in the incoming wind velocity. With the help of statistical methods, we seek to find deeper insight into the correlation of power fluctuations of wind turbines and the relevant influence factors like wind direction and velocity.
We investigate the interaction of an elastic wind turbine rotor with the incoming wind. This interaction is influenced by the characteristics of the rotor as well as the wind conditions. By coupling a flow solver with a solver for the structural deformations, so-called fluid structure interaction methods allow numerical simulations of these aeroelastic effects at the turbine. We also investigate turbulent wind conditions which require a special treatment.
We use model wind turbines to research the incoming wind field in wind tunnel experiments. For this purpose, a so called active grid is used to generate a specific wind field that allows to analyse its influence on the model wind turbine. With the help of stochastic methods such as the Langevin-equation, the measurement data recorded at the wind turbine is evaluated in order to draw conclusions about the inflow. The used method will later be transferred to real wind turbines.