弹道枪不同水深下全淹没式发射膛口流场的数值分析

张京辉 余永刚

张京辉, 余永刚. 弹道枪不同水深下全淹没式发射膛口流场的数值分析[J]. 爆炸与冲击, 2020, 40(10): 104201. doi: 10.11883/bzycj-2019-0478
引用本文: 张京辉, 余永刚. 弹道枪不同水深下全淹没式发射膛口流场的数值分析[J]. 爆炸与冲击, 2020, 40(10): 104201. doi: 10.11883/bzycj-2019-0478
ZHANG Jinghui, YU Yonggang. Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun at different water depths[J]. Explosion And Shock Waves, 2020, 40(10): 104201. doi: 10.11883/bzycj-2019-0478
Citation: ZHANG Jinghui, YU Yonggang. Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun at different water depths[J]. Explosion And Shock Waves, 2020, 40(10): 104201. doi: 10.11883/bzycj-2019-0478

弹道枪不同水深下全淹没式发射膛口流场的数值分析

doi: 10.11883/bzycj-2019-0478
基金项目: 国家自然科学基金(11372139)
详细信息
    作者简介:

    张京辉(1995- ),男,博士研究生,zjhsg@vip.qq.com

    通讯作者:

    余永刚(1963- ),男,博士,教授,博士生导师,yygnjust801@163.com

  • 中图分类号: O354.5; TJ6

Numerical investigation on the muzzle flow field of an underwater submerged launched ballistic gun at different water depths

  • 摘要: 为了解弹道枪水下全淹没发射时,水深对膛口流场演化特性的影响,建立了二维轴对称非稳态膛口流场模型。采用流体体积函数多相流模型、标准k-ε湍流模型和Schnerr-Sauer空化模型,结合动网格及用户自定义函数技术,对水下全淹没发射膛口流场演变全过程进行了数值模拟。搭建了弹道枪水下可视化射击实验平台,对12.7 mm口径弹道枪在水中全淹没式发射时膛口流场演化过程进行了观测,并验证了数值模型的合理性。在此基础上,对比了不同水深下(h=1~100 m)膛口流场的演化特性。通过对比发现:在不同水深条件下,在膛口流场影响范围内,弹丸膛外行程随时间的变化均满足指数函数规律;水越深,膛口流场典型波系结构形成所需时间越长,且燃气在膛口轴向马赫盘处的温度和压力峰值越低,压力振荡幅度也越小,更快趋于平稳,但在径向上,水越深,压力振荡持续时间越长。
  • 图  1  计算域及边界条件

    Figure  1.  Calculation domain and boundary conditions

    图  2  不同网格数下膛口中心速度沿轴向的变化(t=1 ms)

    Figure  2.  Velocity of the muzzle center varying along the axial direction for different grid quantities at t=1 ms

    图  3  实验装置示意图

    Figure  3.  Schematic diagram of the experimental device

    图  4  实验照片阴影图与模拟相图对比情况

    Figure  4.  Comparison of experimental shadow photos and simulated phase diagrams

    图  5  射流轴向、径向最大位移对比

    Figure  5.  Comparison of the maximum axial and radial displacements of the jet flow between experimental and simulated results

    图  6  不同水深下弹丸膛外行程

    Figure  6.  Displacement-time curves of the projectile at different water depths

    图  7  空气中发射时典型膛口流场流谱示意图

    Figure  7.  Schematic diagram of the typical muzzle flow field during air launch

    图  8  全淹没发射时膛口流场流谱示意图

    Figure  8.  Schematic diagram of the muzzle flow field during submerged launch

    图  9  h=1 m时膛口中心剖面马赫数云图与等值线图

    Figure  9.  Mach number cloud map and contour map at h=1 m

    图  10  h=50 m时膛口中心剖面马赫数云图和等值线图

    Figure  10.  Mach number cloud map and contour map at h=50 m

    图  11  h=100 m时膛口中心剖面马赫数云图和等值线图

    Figure  11.  Mach number cloud map and contour map at h=100 m

    图  12  h=50 m是膛口中心剖面压力云图

    Figure  12.  Pressure cloud map of the muzzle center section at h=50 m

    图  13  膛口压力分布曲线

    Figure  13.  Pressure distribution curves of muzzle

    表  1  膛口初始参数

    Table  1.   Initial parameters for the muzzle

    h/ml/mv0/(m·s−1)pk0/MPa
    1123014.5
    50122015.5
    100120720.5
    下载: 导出CSV

    表  2  拟合参数

    Table  2.   Fitting parameters

    h/mx0/mx1/mt1/ms
    11.091.094.55
    500.840.843.55
    1000.790.793.42
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-12-25
  • 修回日期:  2020-03-02
  • 刊出日期:  2020-10-05

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