Aero-Acoustical Analysis Of The Wake Flow Of A Cylinder

A flowed cylinder creates a tonal noise through the turbulences created in the backlash of the cylinder. The main frequency of this noise can be predicted by analytical method using the Strouhal Number. With numerical CFD calculations the flow can be analysed and via the acoustical analogy (Lighthill, Ffowcs-Williams - Hawkings (FW-H)) the sound generation of the turbulent flow can be calculated. The results of a CFD calculation are compared to the analytical prediction using the Strouhal Number. In addition, these results are compared to measurements with an acoustic camera.