Abstract
Abstract To study the ballistic characteristics of high-speed vertical impact of projectiles on wave liquid surfaces, the method of Detached-Eddy Simulation (DES) with elliptic-blending Reynolds stress model is adopted to numerically simulate the high-speed vertical water entry of projectiles under different fifth-order Stokes wave curvatures. Through experiments, the accuracy and reliability of the numerical method were verified. Based on the numerical simulation method, it is stipulated that the convex curvature of waves is positive and the concave curvature is negative, and the influence of different wave curvatures on water entry trajectories is studied. The research results show that under small curvature wave conditions, the curvature of the entry position has a negligible effect on the axial load during the water entry process; negative curvature positions delay the peak time of the axial load in the entry wave valley compared to positive curvature positions. When the projectile vertically impacts waves at the position with zero curvature at the same actual water entry angle, compared to entering a quiescent free surface, the projectile experiences slower velocity decay, larger axial body loads, earlier peak time of axial load, shorter water entry process, and the trajectory of the projectile is still influenced by the curvature around this position.
Published Version
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