Abstract: Kinematic and dynamic model for the underwater supercavitation projectile is established and simplified, based on cavity model hypothesis and the independence principle of the cavity expansion, the coupling relation between the cavitation number and velocity along with depth and the critical cavitation number are made certain, so the ballistic characteristics of the underwater supercavitation projectile are simulated and researched. The simulation result shows that the own mass and launch depth have great influence on the effective attack range of the underwater projectile, the relationship between the effective attack range and the own mass is linear increase, and the relationship between the effective attack range and the launch depth is similar to linear decrease; in practical operation, the influence of the launch depth on the effective attack range must be considered, and the effective attack range can be increased by increasing properly the own mass of the projectile.

Key words: supercavitation projectile, cavitation number, critical cavitation number, effective attack range

摘要： 建立并简化了水下超空泡射弹动力学和运动学模型，基于空泡模型假设和空泡截面独立扩张原理，确定了空化数与速度及深度的耦合计算关系和水下射弹尾翼穿刺前的临界空化数，进而对水下超空泡射弹弹道特性进行了仿真研究。仿真结果表明，水下射弹有效射程受自身质量和发射深度影响很大，有效射程与自身质量成线性增长关系，与发射深度成近似线性递减关系；在实际作战中，需考虑射弹发射深度对有效射程的影响，可以通过适当增加自身质量的方法，增大射弹有效射程。

关键词: 超空泡射弹, 空化数, 临界空化数, 有效射程