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空心弹入水射流与空化特性仿真

项珺邦 王晓光 康会峰 宣佳林 杨柳

项珺邦, 王晓光, 康会峰, 等. 空心弹入水射流与空化特性仿真[J]. 水下无人系统学报, 2024, 32(3): 1-7 doi: 10.11993/j.issn.2096-3920.2023-0163
引用本文: 项珺邦, 王晓光, 康会峰, 等. 空心弹入水射流与空化特性仿真[J]. 水下无人系统学报, 2024, 32(3): 1-7 doi: 10.11993/j.issn.2096-3920.2023-0163
XIANG Junbang, WANG Xiaoguang, KANG Huifeng, XUAN Jialin, YANG Liu. Simulation of jet development and cavitation characteristics of a hollow projectile entering water[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2023-0163
Citation: XIANG Junbang, WANG Xiaoguang, KANG Huifeng, XUAN Jialin, YANG Liu. Simulation of jet development and cavitation characteristics of a hollow projectile entering water[J]. Journal of Unmanned Undersea Systems. doi: 10.11993/j.issn.2096-3920.2023-0163

空心弹入水射流与空化特性仿真

doi: 10.11993/j.issn.2096-3920.2023-0163
基金项目: 国防基础科研项目(JCKY2022407C009); 河北省高等学校科学技术研究项目资助(ZC2023144); 廊坊市科技计划项目(NO.2022019001B).
详细信息
    作者简介:

    项珺邦(2000-), 男, 在读硕士, 主要研究方向为跨介质航行器空化流动特性

  • 中图分类号: TJ630.1;O358

Simulation of jet development and cavitation characteristics of a hollow projectile entering water

  • 摘要: 空心弹是一种内部中空、流动特性复杂的弹丸, 以其轻便稳定和强大毁伤性能备受关注。在其入水过程中, 高速水射流的产生是影响空心弹入水的关键。因此, 研究空心弹通孔孔径对射流和入水特性的影响具有重要意义。文中建立了不同孔径的空心弹垂直入水仿真模型, 并对比了不同孔径弹丸的孔内压力特性与空泡发展差异。通过研究发现, 孔径比与初始碰撞时刻的孔内压力强度存在关联, 且随着孔径比的增加, 射流的高度与速度均有所降低, 这与空心孔内的压力梯度现象有关; 同时, 压力梯度的强度随着孔径比的增加而降低。文中还对空心弹空化现象发展进行了简要描述, 并对孔径比对空化现象的影响进行了分析, 可知随着孔径比的增大, 弹体产生的蒸汽量逐渐减少, 空泡闭合时间提前。

     

  • 图  1  弹丸模型

    Figure  1.  Projectile model

    图  2  计算域示意图

    Figure  2.  Schematic of the computational domain

    图  3  网格划分和局部加密区

    Figure  3.  Mesh and localized mesh encryption zones

    图  4  不同网格数量阻力系数对比曲线

    Figure  4.  Comparison of Cd for different mesh levels

    图  5  空心弹垂直入水实验与仿真相图

    Figure  5.  Simulation and experimental comparison of phase diagrams of water entry

    图  6  空心弹垂直入水射流高度仿真与实验对比

    Figure  6.  Comparison of water jet height simulation and experiment

    图  7  孔径比为0.5时入水时刻液相与压力变化云图

    Figure  7.  Liquid phase and pressure change at the moment of water entry for pore size d/D = 0.5

    图  8  监测点示意图和不同孔径比间测点压力差异

    Figure  8.  Schematic of the distribution of monitoring points and the difference in pressure at measurement points between different aperture ratios

    图  9  空心弹丸入水示意图

    Figure  9.  Schematic diagram of a hollow projectile entering the water

    图  10  射流高度与通孔孔径比大小随时间变化曲线

    Figure  10.  Relationship between jet height and through-hole aperture ratio size with time

    图  11  射流最大速度与孔径比大小随时间变化关系

    Figure  11.  Maximum jet velocity versus aperture ratio size versus time

    图  12  不同孔径比同时刻水相(左)与蒸汽相(右)云图

    Figure  12.  Cloud diagrams of water phase (left) and vapor phase (right) at the same moment for hollow projectile with different apertures

    表  1  弹体参数

    Table  1.   Projectile parameters

    模型L/mmD/mmd/mmM/kg
    a40040204.07
    b243.47
    c282.77
    d321.95
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-12-13
  • 修回日期:  2024-01-08
  • 录用日期:  2024-01-31
  • 网络出版日期:  2024-03-27

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