In this study we investigated the property of the shock wave propagating into the LiF window using the pole-curve method of two-dimensional unsteady flow theory and the hydrokinetical software LS-DYNA. The result derived from the pole-curve method shows that, when the one dimensional planar shock wave moves from the wedge-shaped explosive to the LiF window, the moving direction of the particles changes with the angle of about 3.3°, whereas the change angle actually obtained by the LS-DYNA simulation is 2.77°~3.03°. This disparity may be due to the fact that the rarefaction wave is ignored in the pole-curve method.
SEITZ W L, STACY H L, ENGELKE R, et al. Detonation reaction zone structure of PBX9502[C]//Proceedings of the Ninth Symposium (International) on Detonation. Portland, Orgegen, 1989: 113291.
ZHANG Tao, GU Yan, ZHAO Jibo, et al. Experimental study on shock initiation process of a new insensitive high explosive JBO-9X under high impact pressure[J]. Chinese Journal of Explosives & Propellants, 2016, 39(1):28-33. http://www.cnki.com.cn/Article/CJFDTOTAL-BGXB201601005.htm
[4]
CAMPBELL A W, DAVIS W C, TRAVIS J R. Shock initiation of detonation in liquid explosives[J]. The Physics of Fluids, 1961, 4(4):498-510. doi: 10.1063/1.1706353
[5]
CHIDESTER S K, THOMPSON D G, VANDERSALL K S, et al. Shock initiation experiments on PBX 9501 explosive at pressures below 3 GPa with associated ignition and growth modeling[J]. AIP Conference Proceedings, 2007, 955(1):903-906. https://digital.library.unt.edu/ark:/67531/metadc898062
[6]
GUSTAVSEN R L, SHEFFIELD S A, ALCON R R, et al. Embedded electromagnetic gauge measurements and modeling of shock initiation in the TATB based explosives LX-17 and PBX 9502[J]. AIP Conference Proceedings, 2002, 620(1):1019-1022. http://adsabs.harvard.edu/abs/2002AIPC..620.1019G
DownLoad:
