Simulation of Tail-slap Loads of Supercavitating Projectiles

To investigate the tail-slap loads on supercavitating projectiles, a simple model for cavity-fluid region is presented based on Logvinovich´s Principle. And a series of simulations of fluid - structure interaction (FSI) were done to determine the effects of the slenderness ratio of projectiles on the tail-slap loads. The results show that the impact duration increases as the slenderness ratio increases and the frequency of impacts decrease as the slenderness ratio increases. The larger the slenderness ratio is, the more obviously the body´s flexibility and vibration influent the slapping force. The results developed in this paper will provide reference for the structural dynamics research and optimization design of the supercavitating projectiles.