A hybrid computational aeroacoustic methodology for broadband noise prediction.

Current hybrid computational aeroacoustic methodologies for broadband noise prediction rely on large eddy simulation (LES) for noise source computation, and integral methods for noise propagation. In this paper, LES of a benchmark controlled-diffusion airfoil was conducted, utilizing the rotation rate based Smagorinsky model (RoSM). The RoSM is seen to provide flow results of equal or improved accuracy as compared to the dynamic Smagorinsky model, with 35% less computational cost, with computational benefits of the RoSM increasing with mesh size.