DescriptionIn this work, we present our observations regarding the characteristics of the wake flow generated by a 6MW floating wind turbine. The wind turbine is located in Hywind Scotland offshore wind farm, the world's first floating wind farm. The study is based on a measuring campaign that took place over a four-month period during which two commercial wind lidars were installed on the nacelle of a wind turbine. Using two wind lidars enabled the simultaneous monitoring of both the up- and down-wind conditions. This study focuses on describing the features characterising the far-wake, particularly in the region between three and nine rotor diameters towards the downwind direction. For this purpose, one lidar was configured to scan in a plan position index (PPI) mode, providing spatially distributed data over a horizontal plane at hub height. Figure 1 presents a sample of 10-minute mean wind lidar measurements, averaged in a fixed frame of reference, which reveals the wake trace. The data are used to examine the propagation of the mean velocity deficit and of the corresponding width of the wake. Moreover, we will discuss the impact on the wake characteristics of both the ambient wind conditions (mean speed, shear, veer, and turbulence intensity of the free wind) acquired by an upwind measuring wind lidar and of the motion of the wind turbine (with a particular focus on the side-to-side motion of the nacelle).
|Period||24 May 2023|
|Event title||Wind Energy Science Conference|
|Location||Glasgow, United Kingdom|
|Degree of Recognition||International|
- Floating wind turbines
- Wind lidar
- Nacelle lidar