Research on the Influence of Blade Tip Trailing-Edge Serrated Structure on Wind Turbine Noise Reduction and Performance

Abstract. Wind turbines are a key technology for producing clean energy, but the noise they generate can create environmental concerns. This study explores how serrated edges on turbine blades influence noise, structural safety, and energy output. A prototype wind turbine was equipped with serrated blades and tested at a field site in China. Measurements showed that the serrated design reduced aerodynamic noise by nearly four decibels. At the same time, computer simulations revealed that this design caused a small increase in structural loads and a slight decrease in annual electricity generation. The findings suggest that serrated blades can help reduce the noise impact of wind turbines, but they also highlight the need to carefully weigh the trade-offs between quieter operation, safety margins, and efficiency.