@article {Ryi:2017:0736-2501:345,
title = "Estimation method to achieve a noise reduction effect of airfoil with a serrated trailing edge for wind turbine rotor",
journal = "Noise Control Engineering Journal",
parent_itemid = "infobike://ince/ncej",
publishercode ="ince",
year = "2017",
volume = "65",
number = "4",
publication date ="2017-07-01T00:00:00",
pages = "345-355",
itemtype = "ARTICLE",
issn = "0736-2501",
url = "https://www.ingentaconnect.com/content/ince/ncej/2017/00000065/00000004/art00008",
doi = "doi:10.3397/1/376550",
keyword = "14.5.4, 21.6.3",
author = "Ryi, Jaeha and Choi, Jong-Soo",
abstract = "This article describes a wind tunnel experiment that was undertaken to investigate the changes in the aerodynamic performance of a wind turbine due to the inclusion of a 2D airfoil with a serrated trailing edge designed to reduce the noise caused by a wind turbine rotor blade. The restrictive
condition for the serrated trailing edge equipped with the use of a 2D airfoil was examined through the use of a wind tunnel experiment after studying existing restrictive condition and analyzing prior research on serrated trailing edges. The study was conducted according to Howe's theory,
which is a cornerstone of the study of noise reduction effects produced by a serrated trailing edge. For the serrated trailing edge equipped on a 2D airfoil, the wake distribution and the relation to noise were analyzed in order to determine the restrictive condition in accordance with Howe's
theory. The results indicated that an empirical formula or a theoretical approach should consider changes in the boundary layer thickness of a 2D airfoil, so an empirical noise prediction formula is suggested for the serrated trailing edge. Also, a comparison and an analysis of the prediction
and the experimental results for the noise produced by the NACA0012 or the baseline airfoil equipped with a serrated trailing edge suggested a novel formula for a 2D airfoil. Finally, it is confirmed that 2D airfoil noise data are compared with wind tunnel test data by using an empirical formula
estimationmethod.",
}