Numerical simulation of airfoil trailing edge serration noise

Wei Jun Zhu, Wen Zhong Shen

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Abstract

In the present work, numerical simulations are carried out for a low noise airfoil with and without serrated Trailing Edge. The Ffowcs Williams-Hawkings acoustic analogy is implemented into the in-house incompressible flow solver EllipSys3D. The instantaneous hydrodynamic pressure and velocity field are obtained using Large Eddy Simulation. To obtain the time history data of sound pressure, the flow quantities are integrated around the airfoil surface through the FW-H approach. The extended length of the serration is about 16.7% of the airfoil chord and the geometric angle of the serration is 28 degrees. The chord based Reynolds number is around 1.5x106. Simulations are compared with existing wind tunnel experiments at various angles of attack. Even though the airfoil under investigation is already optimized for low noise emission, numerical simulations and wind tunnel experiments show that the noise level is further decreased by adding the TE serration device.
Original languageEnglish
Publication date2015
Number of pages10
Publication statusPublished - 2015
Event6th International Meeting on Wind Turbine Noise - Glasgow, United Kingdom
Duration: 20 Apr 201523 Apr 2015
Conference number: 6

Conference

Conference6th International Meeting on Wind Turbine Noise
Number6
Country/TerritoryUnited Kingdom
CityGlasgow
Period20/04/201523/04/2015

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