空化器直径对超空泡航行器空泡性能的影响

Based on the Reynolds Averaged Navier-Stokes (RANS) equations, two-dimensional computational fluid dynamics (CFD) simulations are performed to investigate the influence of the cavitator diameter on the hydrodynamic forces and cavitation bubble of the supercavitating underwater vehicle. Results show that the drag of the underwater vehicle increases linearly with the increase of the cavitation number until the critical value, and then grows fast and nonlinearly. The increase of the cavitator diameter leads to an increase of drag for large cavitation numbers, and it also increases the critical cavitation number.