Survey of techniques for reduction of wind turbine blade trailing edge noise.

Barone, Matthew Franklin

Sandia National Laboratories

关键词: Wind Turbines;    Aerodynamics;    Boundary Layers;    Turbines;    Airfoils;   

DOI  :  10.2172/1029824
RP-ID  :  SAND2011-5252
RP-ID  :  AC04-94AL85000
RP-ID  :  1029824

美国|英语

来源: UNT Digital Library

【 摘 要 】

Aerodynamic noise from wind turbine rotors leads to constraints in both rotor design and turbine siting. The primary source of aerodynamic noise on wind turbine rotors is the interaction of turbulent boundary layers on the blades with the blade trailing edges. This report surveys concepts that have been proposed for trailing edge noise reduction, with emphasis on concepts that have been tested at either sub-scale or full-scale. These concepts include trailing edge serrations, low-noise airfoil designs, trailing edge brushes, and porous trailing edges. The demonstrated noise reductions of these concepts are cited, along with their impacts on aerodynamic performance. An assessment is made of future research opportunities in trailing edge noise reduction for wind turbine rotors.