D9.4 Detection of Initial Subsurface Defects in Rotor Blade Leading Edges of Wind Turbines by Means of Active Thermography
- SMSI 2021
2021-05-03 - 2021-05-06
- SMSI 2021 - Measurement Science
- D9 Applications II
- F. Jensen, M. Sorg, A. Fischer - University of Bremen, Bremen (Germany)
- 289 - 290
The surface condition of the leading edge of rotor blades has a significant influence on the lifetime and performance of a wind turbine. Initial subsurface defects like air traps can lead to a premature surface damage by erosion, and a delayed defect detection results in high maintenance and repair costs. Active thermography is proposed as a non-destructive and in situ measuring method to visualize damage patterns on the rotor blade leading edges and to make initial subsurface defects visible. In particular, it enables the investigation of the damage development for mechanical impacts such as rain drops.