Noise reduction effect of airfoil and small-scale rotor using serration trailing edge in a wind tunnel test

• Published in: Science China. Technological sciences 2017-02, Vol.60 (2), p.325-332
• Main Authors: Ryi, Jaeha, Choi, Jong-Soo
• Format: Article
• Language: English
• Subjects: Engineering; Noise control; Noise levels; Noise prediction; Noise reduction; Scale models; Trailing edges; Two dimensional models; Wind effects; Wind tunnel testing; 二维翼型; 后缘; 气动性能; 转子; 锯齿; 降噪效果; 风力涡轮机; 风洞试验
• ISSN: 1674-7321; 1869-1900
• DOI: 10.1007/s11431-016-0208-4

This paper discussed a noise reduction effect of airfoil and small-scale model rotor by using attached serration trailing edge in the wind tunnel test condition. In order to analyze the changes in the performance due to the inclusion of a serrated trailing edge designed to reduce noise, a 10 k W wind turbine rotor was equipped with a thin serrated trailing edge. The restrictive condition for the serrated trailing edge equipped with the using of a 2D airfoil was examined through the using of a wind tunnel experiment after studying existing restrictive condition and analyzing prior research on serrated trailing edges. The aerodynamic performance and noise reduction effect of a small-scale model were investigated with the using of a serrated trailing edge. Moreover, the noise levels from the experiment were considered that the noise prediction method could be used for a full-scale rotor. It is confirmed that noise reduction effect is compared with wind tunnel test data at the 2D airfoil and model rotor condition.