Abstract
This paper presents the prediction of the aerodynamic sound sources and the far-field sound on the wing-tip flow. Analysis object is NACA0012 of the lifting condition and Reynolds number based on chord length and uniform velocity is 2×10^5. The aerodynamic sound sources were calculated using incompressible LES (Large-Eddy Simulation) with 40 million grid points around the wing. Distribution of ∂T_<ij>/∂X_i∂X_j indicated that the sound source exist on the wing-tip. The far-field sound predicted by lihgthill tensor showed that the contribution into the airfoil noise by the sound generated from wing-tip flow is small at the Strouhal number 6 to 11.25 Hz.
