潜射超空泡射弹出水的流体力学现象的实验研究

Experiments on water exit phenomenon of underwater launched projectiles with a supercavity

对带有超空泡的潜射射弹出水过程的流体力学现象进行了实验研究。用高速摄影机拍摄了射弹模型出水的全过程,清晰地观察了射弹在航行中空泡的发展、脱落与自由面相互作用及溃灭过程,分析了空泡对射弹出水姿态的影响。通过测量射弹的速度,发现出水时射弹的速度有时会呈突增现象,进一步了解了潜射射弹出水的复杂过程。

The hydrodynamic phenomena of the underwater launched projectiles with supercavities exiting from water were experimentally studied. A high-speed camera was used to record the whole process of dif-ferent testing models. The cavities development, shedding, collapse and the interaction with the free sur-face were observed. The influence of the supercavity on the projectile attitude during the water exit was analyzed. The change of the velocity was calculated and the results show that the sudden increase of the velocity existed.