用超高速阴影摄影技术研究微喷射现象

Study on micro-jet on ultra-high speed shadow photography

摘要: 以转镜式高速分幅相机作为记录载体，设计并建立了高速阴影系统。用该摄影系统研究在爆轰加载下金属表面的微喷射现象，以及由此产生的波阵面发展过程。通过获取的阴影图像观察到了带有特定形状缺陷（矩形槽、盲孔）锡自由表面的微喷射演变过程，给出了微射流的形状，冲击波阵面以及喷射物头部的运动速度等物理信息。

Abstract: Based on ultra high speed rotating mirror framing camera, a high speed shadow photography was designed and set up. Micro-jet and its wavefront was observed on the Tin free surface loaded explosive which existed a strip of rectangle groove and three small blind holes. The shape of jet、velocity of shock wavefront and ejecta head were obtained through shadow images.