Abstract: ［Objective］ This study aims to investigate the mechanism of rain erosion on windturbine blade coating and the influencing factors of rain erosion.［Methods］This study focuses on therainfall characteristics of the operating environment for wind turbine blades. Rain erosion resistancetests were conducted under six different rainfall conditions，by the rotating arm rain erosion test method， while maintaining identical environmental temperature，test speed，and raindrop diameter. Throughanalysis and comparison of the time of coating failure and mass loss under varying rainfall conditions.［Results］ It was observed that coatings in the tip to middle region exhibited different degrees ofbreakdown. The higher of rainfall，the greater the impact on the coating performance. However，the degradation of the coating protective performance exhibited a non-linear relationship with increasingrainfall intensity.［Conclusion］When evaluating the performance of wind turbine blade coatings inactual wind field environments based on laboratory rain erosion test results，the damaging effects of different rainfall intensities on the coatings should be comprehensively considered，and rainfall conditions should be set based on the rainfall environment in wind fields. 

Key words: wind turbine blade coating, resistance to rain erosion test, rainfall intensity

摘要： 【目的】研究风电叶片涂层受到雨蚀作用的机理及雨蚀作用的影响因素。【方法】针对风电叶片所在环境的降雨特点，选择 6种降雨强度条件，采用旋转臂雨蚀试验方法，在相同的环境温度、试验速度和雨滴直径条件下，进行耐雨蚀试验。通过对不同降雨强度条件下涂层出现破坏的时间以及质量损失进行分析和对比。【结果】在叶尖至中部区域的涂层均出现不同程度的击穿现象，并且降雨强度越大，对涂层性能的影响越大，但涂层防护性能衰减与雨量增长呈非线性关系。【结论】在利用实验室雨蚀试验结果对风电叶片涂层在实际风场环境中的性能进行评价时，应综合考察不同降雨强度对涂层的破坏情况，基于风场的降雨环境进行降雨强度条件的设定。

关键词: 风电叶片涂层, 雨蚀试验, 降雨强度

CLC Number: 

• TQ635