Analysis of tail-slaps of supercavitating vehicle influenced by distortion of cavity shape

The tail-slaps of supercavitating vehicle and the distortion of cavity shape are coupling with each other. The coupling motion equation of supercavitating vehicle was established and the tail-slaps of the vehicle influenced by the distortion of cavity shape were also analyzed in different conditions of velocity and initial angel velocity. The research results show that the vehicle's rotating angel, movement cycle, lift force of tail-slaps and drag force of tail-slaps increase by the effect of the distortion of cavity shape. In different velocities, the vehicle's rotating angel, movement cycle and tail-slap cycle, which are influenced by the distortion of cavity shape, decrease by the increment of velocity. In different angel velocities, the vehicle's rotating angel, movement cycle and tail-slap cycle, which are influenced by the distortion of cavity shape, increase by the increment of angel velocity.