Numerical Simulation Of The Flow Noise Of A Finite Circular Cylinder

For many engineering applications flow generated noise is a relevant component of the total sound. The prediction of the flow noise is often not easy because of the high complexity of the turbulent flow field. Even with increasing computational power and for simple geometries, the direct numerical simulation is often too expensive because of the big di erence in acoustic and fluid length scales. A possible solution is the separate calculation of the flow field and the acoustics. A known hybrid approach is the combination of a large eddy simulation (LES) with the acoustic analogy of Ffowcs-Williams-Hawkings (FW-H). The realization of this method with two di erent open source CFD codes is presented. The simulation of the flow field is performed with SU2 and OpenFOAM respectively and used for the calculation of flow noise of a finite wall-mounted circular cylinder configuration. Simulation results are compared to measurement data from an aeroacoustic wind tunnel and other available data from simulations and measurements.