Hybrid Numerical Prediction of Flow-Induced Noise of the Hydrofoil Using the Uncorrelated Wall Plane Wave Technique

Abstract A hybrid numerical approach, combining the uncorrelated wall plane wave (UWPW)-finite element method (FEM) with the refinement of the turbulent boundary layer parameters, was employed to achieve efficient prediction of flow-induced noise of underwater structures. The flow fields of structures are obtained using Reynolds-averaged Navier–Stokes simulation, refining the boundary layer parameters in semi-empirical models. The wall pressure field is synthesized by the uncorrelated wall plane wave technique, followed by an FEM solver that can be used to compute the vibroacoustic response. The approach is implemented to predict the flow-induced acoustic radiation of the NACA 0012 hydrofoil. The results are compared with those from the large-eddy simulation (LES)-FEM approach; the UWPW-FEM approach exhibits superior computational efficiency and simplicity. The hybrid numerical approach provides a reliable and efficient technical solution for predicting the flow-induced noise of hydrofoils.