Ballistic Characteristics of High-Speed Projectiles Entering Water Vertically

The formation of supercavitation after a high-speed projectile enters water has decisive impact on the underwater ballistic and penetration projectile. In this study, Ansysfluent19.0 simulation software is used to study entry chosen at velocities 300, 400, 500, 600 m/s. cavitation characteristics, trajectories, flow-field characteristics are analyzed for 5.8-mm caliber conical flat head projectile, as well t wo other projectiles same different shapes — cone elliptical entering vertically velocities. attenuation rate velocity increases with increase velocity. Within first 3ms, flat-head 600m / s 55.6 %, while 300m only 16.3 % within 3ms. Among considered, most stable vertical entry. stability an worse, trajectory still worse