Abstract
In order to clarify the mechanism of aerodynamic noise generation, aerodynamic sound source was estimated with Lighthill theory. The sound source term of the Lighthill equation of the aerodynamic sound generated from a circular cylinder were compared with a numerical simulation and a wind tunnel experiment. The results showed the sound source term measured by the PIV experiments is qualitatively corresponding to the result by the LES analysis. The accuracy of the spectral analysis and the directivity analysis of the aerodynamic noise based on the PIV experiments is almost the same as that of the numerical simulations.
