【摘要】 采用二维不定常流理论中的极曲线方法,对冲击波进入楔形受试炸药/LiF窗口界面的冲击波波后流场状态进行理论分析,同时采用流体动力学软件LS-DYNA对模型的波后流场状态进行数值模拟。结果表明,对于所研究的模型,一维平面正冲击波进入楔形受试炸药/LiF窗口界面时,由于斜激波的存在,波后粒子运动方向发生偏转,偏转角为3.3°。数值模拟结果表明,在相同模型条件下,冲击波波后粒子偏转角在2.77°~3.03°之间。二者的差异源于极曲线理论中未考虑稀疏波的影响。更多还原

【Abstract】 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.更多还原