同轴数字全息技术在高速射流粒子测量中的应用

Application of in-line digital holography to micro-jet particles measurement

1.
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

摘要: 讨论了数字全息的理论和数字全息在爆轰实验中的应用。在解决了系统分辨率、动态模糊、安全和防护、精确同步的基础上，使用数字全息技术获得了中心刻有锥形小孔的铝飞片在爆轰加载下的喷射物的全息图，并提供了该全息图的数字再现图像。在照相视场内喷射粒子的速度约2.7~4 km/s，粒子粒径从几微米至几十微米。
- 爆炸力学 /
- 粒子测量 /
- 数字全息 /
- 微喷射粒子
Abstract: The digital holographic theories and application in explosion were discussed. The digital hologram of micro-jet from Al flyer with a small conical hole in center under shock load was obtained, based on the questions solved about the resolving power, the dynamic blur, the safety and the accurate time delay synchronization. The micro-jet particles were reconstructed from the hologram in computer. The velocities of micro-jet particles ranged from 2.7 to 4 km/s. And their diameters were from several micrometers to tens of micrometer.
- mechanics of explosion /
- particle measurement /
- digital holography /
- micro-jet particles