Flow Noise Assessment and Analysis of Submersible Buoy based on FEM/AML Method

The flow noise generated by irregular currents will affect the information acquisition and transmission of submersible buoy. Therefore, it is of great significance to reasonably assess the flow noise of the submersible buoy. In this work, a numerical simulation research using large eddy simulation (LES) and Finite Element Method/Automatically Matched Layer (FEM/AML) method made on a NACA airfoil model. The numerical simulation results of sound pressure level on filed point are in good agreement with the FLUENT data based on the FW-H equation in frequency domain. According to the results of surface color image on the submersible buoy, low-medium frequency flow noise will concentrate on the rear part of submersible buoy, the radiation noise of the buoy body in the sound field is distributed in a petal shape.