Simulation of magnetically driven quasi-isentropic compression experiments with windows
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摘要: 在二维磁驱动数值模拟程序MDSC2中增加了LiF材料的材料参数和功能模块，使MDSC2程序具有了求解带窗口磁驱动准等熵压缩实验的能力。采用MDSC2程序，对大电流脉冲功率装置上的exp-3-window、exp-6-window带窗口磁驱动准等熵压缩实验进行了模拟。数值模拟结果表明，二维磁驱动数值模拟程序MDSC2能正确模拟带窗口磁驱动准等熵压缩实验exp-3-window和exp-6-window的全过程，模拟的飞片/窗口界面速度在飞片/窗口界面速度的上升阶段、峰值附近和卸载阶段与实验测量基本一致，验证了新程序的计算有效性。MDSC2程序对带窗口磁驱动准等熵压缩实验的正确模拟有助于磁驱动样品物性实验的研究。
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关键词:
- 磁驱动准等熵压缩实验 /
- 二维磁驱动数值模拟程序 /
- 飞片/窗口界面速度 /
- 磁流体力学 /
- 数值模拟
Abstract: The material parameters and functional modules of LiF are added to the two-dimensional magnetically driven simulation code (MDSC2), which makes MDSC2 code have the ability to simulate the magnetically driven quasi-isentropic compression experiments with windows. Magnetically driven experiments with windows, shots of exp-3-window and exp-6-window, which were carried out in a large pulsed power device, are simulated and analyzed by the MDSC2 code. The simulated flyer plate/window interface velocities agree well with the experimental records by Velocity Interferometry System for Any Reflector (VISAR). The magneto-hydrodynamic code can correctly simulate the magnetically driven experiments with windows, which is helpful to understand the physical mechanism of sample material behaviors in magnetically driven experiments with windows. -
图 1 大电流脉冲功率装置上带窗口磁驱动准等熵压缩实验负载结构示意图
Figure 1. Cross section of 3D load configuration in the magnetically driven quasi-isentropic compression experiment
图 3 模拟的exp-6-window实验飞片/窗口界面速度
Figure 3. Interface velocity for 0.98/8 mm Al/LiF of exp-6-window
图 5 模拟的exp-3-window实验飞片/窗口界面速度
Figure 5. Interface velocity for 1.008/9.532 mm Al/LiF of exp-3-window
表 1 带窗口磁驱动实验负载参数
Table 1. Load parameters for magnetically driven experiments with windows
No. ${\delta _{{\rm{fa}}}}$/mm ${\delta _{{\rm{wa}}}}$/mm ${\delta _{{\rm{fc}}}}$/mm ${\delta _{{\rm{wc}}}}$/mm ${g_0}$/mm W/mm exp-3-window 1.008 9.532 1.002 9.533 1.20 13 exp-6-window 0.980 8 1.089 8 1.24 11 
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