圆柱体低速入水空泡试验研究

针对入水空泡生成机理和发展过程, 以及影响入水空泡发展的复杂因素等开展入水试验研究. 通过垂直和倾斜两种方式入水试验研究, 分析了入水过程中的一系列流动现象, 以及空泡的生成、 发展和闭合, 同时通过对比试验结果得出了空泡闭合方式与入水速度之间的关系; 在此基础之上开展了多弹体入水试验, 分析了串列和并列入水时空泡的生成和相互之间的影响, 以及对运动体本身稳定性的影响.

Low speed water-entry of cylindrical projectile

Experimental studies of the water-entry of cylinder bodies are conducted using high-speed camera to capture the splashes over the water surface and the subsurface cavity shapes during water entry and the cavity-running phase. Cavity evolution is discussed on single 140? conical cylinder body such as formation, development, and pinch-off of vertical and oblique entry. The dependence of the pinch-off type on the entry velocity is discussed for various entry speeds. The phenomena of two-body water entry in series and side-by-side are discussed in the end of this paper, and the data show that the spatial distance between the two bodies has a great influence on the development and the stability of the cavity and the dynamics of both bodies themselves.