PDV experiments on shock-loaded particles

18th APS-SCCM; 24th AIRAPT

Prudhomme, G.^1,2 ; Mercier, P.^1 ; Berthe, L.^2

CEA, DAM, DIF, Arpajon

F-91297, France^1

PIMM, UMR 8006, CNRS-Arts et Métiers ParisTech, 151 bd de l'Hôpital, Paris

F-75013, France^2

关键词: Diameter distributions;    High explosives;    Initial velocities;    Metallic plate;    Photonic doppler velocimetry;    Plane wave generator;    Spherical particle;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/500/14/142027/pdf
DOI  :  10.1088/1742-6596/500/14/142027

来源: IOP

【 摘 要 】

We present results from PDV (Photonic Doppler Velocimetry, also known as HetV -Heterodyne Velocimetry) experiments in which particles are ejected from shock-loaded metallic plates. The shocks induced in the samples are generated using high-explosive plane-wave generators. We manage to accelerate calibrated particles placed in the spot facings of a metal transmitter. These micron-sized spherical particles are made of copper or gold. The slowing down of the particles in air is observed; using their dragging behavior, we can therefore roughly infer both initial velocity and diameter distributions.