Analysis of flow field and sound field characteristic of 2D airfoil based on FLUENT

Airfoil is one of the major components for wind turbine blades. 2D numerical simulation of the NACA4412 airfoil was carried out based on LES method by using FLUENT6.3 software. The main factors of large scale separation and vortex were found out by applying precision finite volume method and SIMPLE algorithm. According to the characteristic of the frequency spectrum of the noise signal and flow field, it was found that the frequency ranges of noise source between 330 Hz and 470 Hz by using FW-H acoustic model of FLUENT aeroacoustics software. It provided a reliable theoretical basis for the optimum design and noise reducing of wind turbine and airfoil.