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research-article

Aerodynamic analysis of a pits eroded airfoil

[+] Author and Article Information
Yan Wang

Key Laboratory of Mechanics on Environment and Disaster in Western China, Ministry of Education, Lanzhou University, Lanzhou, China; School of Energy & Power Engineering, Lanzhou University of Technology, Lanzhou, China
yw2011@lzu.edu.cn

Ruifeng Hu

Research Center for Applied Mechanics, School of Mechano-Electronic Engineering, Xidian University, Xi'an, China
rfhu@xidian.edu.cn

Xiaojing Zheng

Key Laboratory of Mechanics on Environment and Disaster in Western China, Ministry of Education, Lanzhou University, Lanzhou, China; Research Center for Applied Mechanics, School of Mechano-Electronic Engineering, Xidian University, Xi'an, China
xjzheng@lzu.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4037380 History: Received February 08, 2017; Revised June 15, 2017

Abstract

Leading edge erosion is a considerable threat to wind turbine performance and blade maintenance, and it is very imperative to accurately predict the influence of various levels of erosion on wind turbine performance. In present study, an attempt to investigate leading edge erosion effects is undertaken by calculating the performance of wind turbine airfoil by Computational Fluid Dynamics (CFD). Two-dimensional incompressible RANS equation and k-? SST turbulence model are adopted to compute the aerodynamics of a S809 airfoil at various erosion depths, pits densities, erosion area and locations based on a pitting erosion model proposed in this work. The results indicate that pitting erosion has remarkably undesirable influences on the aerodynamic performance of the airfoil. The critical erosion depth, pits density and erosion area has been obtained from the numerical simulation. Moreover, a path-coefficient analysis was also carried out and demonstrated that the concerning factors are independent of each other, and Reynolds number and pits density are the most dominant parameters.

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