Research on prediction method of pulsating pressure of underwater vehicles

摘要

When fluid flows through the underwater vehicles, flow separation occurs, and the flow separation generates eddy currents, which in turn induce the pulsating pressure on the surfaces of underwater vehicles, generating noise and making the underwater vehicle easy to expose. We conducted research on this phenomenon, talking cone-column shell as the research object and based on the Large Eddy Simulation (LES) theory. Additionally, the calculation results of each parameter such as grid scale of the structural surface, grid structure and height of the first layer grid with different values were compared with the experimental values to determine the model simulation parameter values with the highest calculation accuracy. Furthermore, the systematic numerical prediction method of pulsating pressure was supposed by the combination of numerical and experimental methods. Moreover, accuracy of the prediction method was verified by experiments. The prediction method provides a generally good reference basis and a simple tool for engineering applications.