Photonic Doppler Velocimetry (PDV) has been fielded on small scale fragment impact experiments on double base propellant. A 130 mm block of propellant was impacted with a 20 mm diameter cylinder at 1003 ± 10 m s~(-1) and four PDV probes recorded rear surface motion at different radial distances between 10 mm and 60 mm from impact centre. The PDV was fielded alongside high speed video diagnostics using a dichroic mirror which reflected visible light whilst transmitting the 1550 nm wavelength which the PDV operated at. The rear surface velocity was compared to 2D numerical simulations of the experiment and found to be in good agreement. Additional material moving at up to 2 km s-1 was detected at break out.
展开▼
机译：光子多普勒速度（PDV）已在双基推进剂上的小规模片段冲击实验上进行。 130mm的推进剂块在1003±10 m S〜（-1）下用20mm直径的圆筒撞击，并且四个PDV探针在距离冲击中心10mm至60mm之间的不同径向距离处记录后表面运动。使用二向色镜，PDV与高速视频诊断一起进行，该二向色镜反射可见光，同时传输PDV操作的1550nm波长。将后表面速度与实验的2D数值模拟进行比较，发现符合良好的一致性。在突破时检测到高达2公里S-1的额外材料。
展开▼
