A Study on Characteristics of Plasma Generated by Hypervelocity Impact
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摘要: 采用理论分析和数值模拟方法,对超高速撞击过程中产生的等离子体特性进行了研究。首先,结合热力学和统计物理理论,建立热电离物理模型,推导出热平衡等离子体电离度与温度的关系;进而由热平衡状态下的速度分布,获得等离子体电导率与温度的关系;最后,建立铝弹丸撞击靶板的三维有限元模型,模拟出弹丸以6.0 km/s的初速度、60入射角斜撞击平板的全过程,给出物理模型中所需的物理参数,分析了超高速撞击过程中产生的等离子体特性。通过对比物理实验中测得的等离子体参数,表明模型预测结果与实验结果具有较好的一致性,验证了该模型的有效性。Abstract: The characteristics of the plasma generated by hypervelocity impact have been studied by theoretical analysis and numerical simulation. Based on the theory of thermodynamics and statistical physics, a model of thermal ionization is proposed to describe the relationship between the degree of ionization and temperature. Plasma conductivity related to temperature is obtained by considering the velocity distribution law at heat balance. Three-dimensional model of an aluminum plate impacted by a spherical projectile with 6.0 km/s at an angle of 60 is established, and the corresponding simulation is performed. Then the parameters of the physical model are obtained, and the characteristics of plasma generated by hypervelocity impact are analyzed. There is a good agreement between the model predictions and the experiment results, which indicates that the model is effective and reasonable for analyzing the characteristics of plasma.
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Tang M, Bai J S, Li P, et al. Numerical simulation of hypervelocity impact of Al-spheres on bumper [J]. Initiators and Pyrotechnics, Initiators Pyrotechnics, 2007(3): 23-27. (in Chinese) 唐蜜, 柏劲松, 李平, 等. 铝球超高速撞击防护屏的数值模拟研究 [J]. 火工品, 2007(3): 23-27. Zhang W, Pang B J, Jia B, et al. Numerical simulation of debris cloud produced by hypervelocity impact of projectile on bumper [J]. Chinese Journal of High Pressure Physics, 2004, 18(1): 47-52. (in Chinese) 张伟, 庞宝君, 贾斌, 等. 弹丸超高速撞击防护屏碎片云数值模拟 [J]. 高压物理学报, 2004, 18(1): 47-52. Chi R Q, Guan G S, Pang B J, et al. Models for momentum of debris cloud and ejecta produced by hypervelocity impacts of aluminum spheres with thin aluminum sheets [J]. Chinese Journal of High Pressure Physics, 2009, 23(1): 59-64. (in Chinese) 迟润强, 管公顺, 庞宝君, 等. 碎片云动量特性数值仿真研究 [J]. 高压物理学报, 2009, 23(1): 59-64. Jia G H, Huang H, Hu Z D. Simulation analyse of hypervelocity impact perforation [J]. Explosion and Shock Waves, 2005, 25(1): 47-53. (in Chinese) 贾光辉, 黄海, 胡震东. 超高速撞击数值仿真结果分析 [J]. 爆炸与冲击, 2005, 25(1): 47-53. Hu Z D, Huang H, Jia G H. The characteristics of debris cloud produced by hypervelocity impact [J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2006, 26(S4): 747-749. (in Chinese) 胡震东, 黄海, 贾光辉. 超高速撞击碎片云特性分析 [J]. 弹箭与制导学报, 2006, 26(S4): 747-749. Guan G S, Zhang W, Pang B J, et al. A study of penetration hole diameter in thin Al-plate by hypervelocity impact of Al-spheres [J]. Chinese Journal of High Pressure Physics, 2005, 19(2): 132-138. (in Chinese) 管公顺, 张伟, 庞宝君, 等. 铝球弹丸高速正撞击薄铝板穿孔研究 [J]. 高压物理学报, 2005, 19(2): 132-138. Liu S, Li Y, Huang J, et al. Hypervelocity impact test results of Whipple shield for the validation of numerical simulation [J]. Journal of Astronautics, 2005, 26(4): 505-508. (in Chinese) 柳森, 李毅, 黄洁, 等. 用于验证数值仿真的Whipple屏超高速撞击试验结果 [J]. 宇航学报, 2005, 26(4): 505-508. Tang E L, Zhang Q M, Zhang J. Characteristic parameter measurement of plasma generated during hypervelocity impact on LY12 aluminum target [J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2008, 28(4): 110-112. (in Chinese) 唐恩凌, 张庆明, 张健. 超高速碰撞LY12铝靶产生等离子体的特征参量测量 [J]. 弹箭与制导学报, 2008, 28(4): 110-112. Tang E L, Zhang Q M, Zhang J. Preliminary study on magnetic induction intensity induced by plasma during hypervelocity impact [J]. Chin J Aeronaut, 2009, 22(4): 387-392. Harano T, Machida Y, Fukushige S, et al. Preliminary study on sustained arc due to plasma excited by hypervelocity impact of space debris on the solar array coupon [J]. Int J Impact Eng, 2006, 33: 326-334. Crawford D A, Schultz P H. The production and evolution of impact-generated magnetic fields [J]. Int J Impact Eng, 1993, 14: 205-216. Mellado E M, Hornung K, Kissel J. Ion formation by high velocity impacts on porous metal targets [J]. Int J Impact Eng, 2006, 33: 419-430. Ratcliff P R, Burchell M J, Cole M J, et al. Experimental measurements of hypervelocity impact plasma yield and energetics [J]. Int J Impact Eng, 1997, 20: 663-674. Tang W H, Zhang R Q. Introduction to Theory and Computation of Equations of States [M]. 2nd Ed. Beijing: Higher Education Press, 2008. (in Chinese) 汤文辉, 张若棋. 物态方程理论及计算概论 [M]. 第2版. 北京: 高等教育出版社, 2008. Michael A L, Allan J L. Principles of Plasma Discharges and Materials Processing [M]. Translated by Pu Y K. 2nd Ed. Beijing: Science Press, 2005. (in Chinese) Michael A L, Allan J L. 等离子体放电原理与材料处理 [M]. 蒲以康, 译. 第2版. 北京: 科学出版社, 2005. Tang E L, Zhang Q M, Zhang J. Conductivity measurement of an expanding plasma cloud generated by hypervelocity impact LY12 aluminum target [J]. High Power Laser and Particle Beams, 2009, 21(2): 297-300. (in Chinese) 唐恩凌, 张庆明, 张健. 超高速碰撞LY12铝靶产生膨胀等离子体云的电导率测量 [J]. 强激光与粒子束, 2009, 21(2): 297-300. Tang E L, Zhang Q M, Zhang J. Electron temperature diagnosis of plasma generated by hypervelocity impact of a LY12 aluminum projectile into a LY12 aluminum target [J]. Explosion and Shock Waves, 2009, 29(3): 323-327. (in Chinese) 唐恩凌, 张庆明, 张健. 超高速碰撞LY12铝靶产生等离子体的电子温度诊断 [J]. 爆炸与冲击, 2009, 29(3): 323-327.
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