Leading edge erosion on a wind turbine blade from Vindeby offshore wind farm is characterized by X-ray tomography, and air bubbles within the top coat are observed. Similar coating systems with and almost without air bubbles within the top coat are tested on a R&D Test Systems style whirling arm rain erosion tester (RET) and found to have different V–N curves. In general, the slope of the two curves was comparable. However, the absolute performance value with RET differs significantly with up to 2.6 times performance advantage to the coating with less bubbles. A micromechanical model of the coating system that takes the air bubbles into account has been developed, and air bubbles are found to have critical effect on the crack initialization in the coating.

中文翻译：

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风轮机叶片的雨蚀及涂层中气泡的影响

来自 Vindeby 海上风电场的风力涡轮机叶片的前缘侵蚀通过 X 射线断层扫描进行表征，并观察到面漆中的气泡。在 R&D Test Systems 风格的旋臂雨蚀测试仪 (RET) 上测试了在面漆中带有和几乎不带有气泡的类似涂层系统，发现它们具有不同的 V-N 曲线。一般来说，两条曲线的斜率是可比的。然而，RET 的绝对性能值显着不同，与气泡较少的涂层相比，性能优势高达 2.6 倍。已经开发了考虑气泡的涂层系统的微机械模型，发现气泡对涂层中的裂纹初始化具有关键影响。