Research on the aerodynamic noise optimization of wind turbine airfoil

Authors

Xiong Liu, University of WollongongFollow
Wenbo Luo, Shantou University, China
Yan Chen, Shantou University, China
Zhiquan Ye, Shantou University, China
Pengzhan Zhou, Changsha University Of Science And Technology

RIS ID

75073

Publication Details

Liu, X., Luo, W., Chen, Y., Ye, Z. & Zhou, P. (2011). Research on the aerodynamic noise optimization of wind turbine airfoil, Chinese Journal of Mechanical Engineering. 47 (14), 134-139.

Abstract

In order to obtain wind turbine airfoils with high lift-to-drag ratio and low noise level, the aerodynamic noise is introduced into the wind turbine airfoil design process. To evaluate the airfoil aerodynamic noise level, the airfoil self-noise model is studied and the NASA self-noise model based on extensive experiments is applied to modeling the airfoil aerodynamic noise. With the airfoil profile described by using shape function perturbation method, taking the aerodynamic performance as a constraint, a noise optimization method is set up with the objective to satisfy the lowest self-noise level. In the design process, XFOIL is used to get the boundary layer parameters and evaluate the airfoil aerodynamic performance. By combining the flow field solver and the direct optimization method, and using the complex method to carry out the search iterations, a Matlab based optimization program is developed. By taking NACA 4415 as the original airfoil and applying the developed program, an airfoil with high aerodynamic performance and low noise level is obtained.