Analysis of Flow-Induced Self-Noise Prediction and Control for the SUBOFF Bow Sonar Dome

This study aims to investigate the influence mechanism of flow-induced self-noise in the sonar compartment at the bow of an underwater vehicle, with a focus on analyzing the control mechanisms of sound-transmission windows (acoustically transparent interfaces) and compartment bulkheads (non-transparent interfaces) to enhance acoustic stealth and detection capabilities. Based on the bow section of the SUBOFF standard model, the external flow field characteristics around complex curvature structures were analyzed using Large Eddy Simulation technology. The turbulent fluctuating pressure was mapped onto structural surfaces via the acoustic finite element method to compute the acoustic response inside the chamber. The regulatory effects of flow velocity changes, interface material properties (Young's modulus, Poisson's ratio, loss factor), and composite structural forms (single-layer/sandwich sound-transmission windows, sound-absorbing layers/damping layers) on self-noise were investigated. This research provides theoretical foundations and engineering application support for the noise reduction design of sonar compartments in underwater vehicles