On the gas leakage way of supercavity and vehicle vibration

Steady and unsteady three-dimension numerical simulations were carried out to ventilated supercavitation by solving Navier Stokes equations with finite volume method based on the two-fluid multiphase flow model and SST (Shear Stress Transport) and DES (Detached Eddy Simulation Model) turbulence model were adopted respectively. The cavity developing process with re-entrant jet flow and two vortex tube gas-leakage way were studied and the change curve of pressure at a fixed point in cavity with time was given. On the other hand, the dynamics equation combined with moving technology was used to control the oscillation of the vehicle in the cavity, the change law of drag, lift, velocity as well as the displacement were given and analyzed.