柱形汇聚几何中内爆驱动金属界面不稳定性

王涛 汪兵 林健宇 钟敏 柏劲松 李平 陶钢

王涛, 汪兵, 林健宇, 钟敏, 柏劲松, 李平, 陶钢. 柱形汇聚几何中内爆驱动金属界面不稳定性[J]. 爆炸与冲击, 2020, 40(5): 052201. doi: 10.11883/bzycj-2019-0150
引用本文: 王涛, 汪兵, 林健宇, 钟敏, 柏劲松, 李平, 陶钢. 柱形汇聚几何中内爆驱动金属界面不稳定性[J]. 爆炸与冲击, 2020, 40(5): 052201. doi: 10.11883/bzycj-2019-0150
WANG Tao, WANG Bing, LIN Jianyu, ZHONG Min, BAI Jingsong, LI Ping, TAO Gang. Numerical investigations of the interface instabilities of metallic material under implosion in cylindrical convergent geometry[J]. Explosion And Shock Waves, 2020, 40(5): 052201. doi: 10.11883/bzycj-2019-0150
Citation: WANG Tao, WANG Bing, LIN Jianyu, ZHONG Min, BAI Jingsong, LI Ping, TAO Gang. Numerical investigations of the interface instabilities of metallic material under implosion in cylindrical convergent geometry[J]. Explosion And Shock Waves, 2020, 40(5): 052201. doi: 10.11883/bzycj-2019-0150

柱形汇聚几何中内爆驱动金属界面不稳定性

doi: 10.11883/bzycj-2019-0150
基金项目: 国家自然科学基金(11702272,11532012,11932018);科学挑战专题(TZ2016001)
详细信息
    作者简介:

    王 涛(1979- ),男,硕士,副研究员,wtao_mg@163.com

    通讯作者:

    柏劲松(1968- ),男,博士,研究员,bjsong@foxmail.com

  • 中图分类号: O347.5

Numerical investigations of the interface instabilities of metallic material under implosion in cylindrical convergent geometry

  • 摘要: 采用自研的高保真度爆轰与冲击动力学程序,对柱形汇聚几何中内爆驱动金属材料界面不稳定性的动力学行为,进行了数值模拟研究。结果表明,首次冲击后至约12 μs,界面发展以RM(Richtmyer-Meshkov)不稳定性为主;12 μs后至冲击波聚心反弹加载前,界面聚心运动处于加速减速状态,界面发展由RT (Rayleigh-Taylor)不稳定性主导;冲击波聚心反弹加载后,界面发展又由RM不稳定性主导。另外,还研究了初始条件(初始振幅、初始波长、钢壳初始厚度和几何构型)对柱形内爆驱动金属材料界面不稳定性的影响。结果显示:初始振幅较大时振幅增长也较大;初始波长较小(模数较大)时振幅增长较小,而且存在一个截止波长;钢壳厚度会抑制扰动增长,也存在一个截止厚度;几何汇聚效应会使扰动增长速度更快。
  • 图  1  爆轰驱动铝实验的扰动振幅

    Figure  1.  Perturbation amplitudes of experiments driven by explosion

    图  2  柱面内爆驱动金属材料界面不稳定性计算模型

    Figure  2.  Computational model of metal interface instability driven by cylindrical implosion

    图  3  密度显示的一维波谱图

    Figure  3.  One dimensional wave diagram displayed by density

    图  4  不锈钢壳内外界面加载压力

    Figure  4.  Loading pressures on inner and outer interface

    图  5  不锈钢壳内界面运动速度

    Figure  5.  Velocity of inner interface

    图  6  不锈钢壳内界面加速度

    Figure  6.  Acceleration of inner interface

    图  7  网格收敛性分析

    Figure  7.  Grid convergence

    图  8  密度场

    Figure  8.  Images of density fields

    图  9  钢壳内界面的扰动

    Figure  9.  Inner perturbed interface of steel shell

    图  10  双模态扰动演化的谱分析

    Figure  10.  Spectral analysis of dual mode perturbation evolution

    图  11  双模态扰动的振幅增长曲线

    Figure  11.  Amplitude growth curves of dual mode perturbation

    图  12  不同初始扰动振幅时的振幅增长曲线

    Figure  12.  Amplitude growth curves for different initial perturbation amplitude

    图  13  不同初始扰动模数时的振幅增长曲线

    Figure  13.  Amplitude growth curves for different initial perturbation mode number

    图  14  不同钢壳初始厚度时的振幅增长曲线

    Figure  14.  Amplitude growth curves for different initial thickness of steel shell

    图  15  不同几何构型下的振幅增长曲线

    Figure  15.  Amplitude growth curves for different geometrical configuration

    图  16  不同几何构型下的界面运动速度

    Figure  16.  Interface velocities for different geometrical configuration

    图  17  平面几何中的界面加速度

    Figure  17.  Accelerations of interface in planar geometry

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  • 收稿日期:  2019-04-23
  • 修回日期:  2019-07-21
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