高时空分辨线成像VISAR在爆轰波物理中的应用

Demonstration of High Resolution Line-Imaging VISAR Application in Detonation Physics

为弥补离散多点激光干涉测速技术空间分辨力弱、系统复杂和成本高的缺点,研制了一套适用于爆轰波物理诊断的高时空分辨的线成像VISAR,其响应时间小于400ps,在约12mm线视场时空间分辨小于100μm。将该仪器应用到空腔驱动平面靶、空腔驱动台阶靶、接触爆轰驱动双样品靶和接触爆轰驱动楔形复合靶的爆轰实验诊断中,实验结果体现了线成像VISAR超高的连续空间分辨能力。线成像VISAR技术将能为爆轰波物理领域中的某些特殊测速需求提供技术支持。

In order to overcome the shortcoming of multipoint laser velocimetry such as low spatial resolution, system complexity and expensive cost, a high time-space resolution line-imaging VISAR for detonation physics was implemented,which was with response time of 400 ps and space resolution of 100 μm. This line-imaging VISAR was used to measure the free surface velocity of four different configuration samples driven by explosive with or without a cavity. These experiment results mostly manifested the high spatial resolution ability of line-imaging VISAR. In the future, the line-imaging VISAR would be indispensable to some special studies of detonation physics.