Point To The Outbreak Of Scattered Detonation-driven Flat-panel Flyer Experimental And Computational Study

The development history of detonation wave propagation and detonation driving are reviewed firstly in this thesis. Basic detonation theory and model are introduced. On the basis of divergent and gazing detonation driving theory, by introduced a parameter θ that is between the radial direction of detonation wave and the flying direction of flyer, this paper calculated the flyer movement with point initiation in bigplate experiment. The finite element hydrocode DYNA2D are introduced.Two kinds of the divergent detonation driving with point initiation are designed in this paper. By means of Velocity Interferometer System for Any Reflector (VISAR), the flyer velocities of different points driven by two explosives (DG01A and JB9014) are recorded. So the movementof the flyer driven by detonation wave that change from divergent detonation to grazing detonation has been obtained. We analyzed the experimental result and compared the ability of acceleration of two explosives. Experimental results show that the first jumping velocity of flyer driven by detonation wave that change from divergent detonation to grazing detonation reduced gradually, and the relative kinetic energy of flyer driven by JB-9014 may reach 69 percent of that driven by JOB-9003.Finally, the numerical simulation has been performed with the finite element hydrocode DYNA2D. The JWL EOS parameters of detonation products have been determined in this experimental condition. Simulative results are in good agreement With the analytical solutions and experimental results, and the maximum relative error between simulative particle velocity and experimental velovity is less than 5 percent. The JWL EOS parameters of detonation products which determined by this work can simulate preferably the bigplate experiment and the cylinder test.