Abstract: Wind farms in Inner Mongolia are mainly distributed in deserts and plateaus. For wind turbines located in areas prone to sandstorms, the blade surface coatings are prone to sand erosion, such as sand holes, cracks, and coating peeling. In this work, the wind tunnel is utilized to construct the wind-sand environment of Alashan plateau, and the erosion test is carried out on the wind turbine under rotating working conditions. Along the airfoil direction: the number of erosion features from most to least is the leading edge, windward side, trailing edge, and leeward side;with the increase of wind speed, the number of erosion features of the entire blade first increases significantly and then increases very little. Along the spanwise direction: the number of erosion features from least to most is the blade root—0.3R section, 0.3R—0.7R section, 0.7R—blade tip section, and the number of erosion features in the 0.7R—blade tip section is almost the same as the sum of the numbers of the other two sections. The area with the most serious sand erosion of the blade coating is the 0.7R—blade tip section of the leading edge. Along the direction from the blade root to the blade tip, the erosion morphology reflects that the wear is getting more and more serious and the sand erosion effect is getting more and more obvious. As the sand particle size increases from 0—1 mm to 1—2 mm, the sand erosion effect is further aggravated.
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2025, Vol. 39 
