破碎浮冰环境下结构物倾斜入水空泡演化特性实验研究

杨帅 鹿麟 胡彦晓 杨哲 陈凯敏

杨帅, 鹿麟, 胡彦晓, 杨哲, 陈凯敏. 破碎浮冰环境下结构物倾斜入水空泡演化特性实验研究[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0229
引用本文: 杨帅, 鹿麟, 胡彦晓, 杨哲, 陈凯敏. 破碎浮冰环境下结构物倾斜入水空泡演化特性实验研究[J]. 爆炸与冲击. doi: 10.11883/bzycj-2024-0229
YANG Shuai, LU Lin, HU Yanxiao, YANG Zhe, CHEN Kaimin. Experimental study on cavity evolution characteristics of an oblique water-entry structure in the crushed floating ice environment[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0229
Citation: YANG Shuai, LU Lin, HU Yanxiao, YANG Zhe, CHEN Kaimin. Experimental study on cavity evolution characteristics of an oblique water-entry structure in the crushed floating ice environment[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2024-0229

破碎浮冰环境下结构物倾斜入水空泡演化特性实验研究

doi: 10.11883/bzycj-2024-0229
基金项目: 国家自然科学基金(52201385);山西省回国留学人员科研资助项目(2024-114)
详细信息
    作者简介:

    杨 帅(2000- ),男,硕士研究生,yangshuai_@163.com

    通讯作者:

    鹿 麟(1988- ),男,博士,副教授,lulin2016@nuc.edu.com

  • 中图分类号: O354; TJ012.3

Experimental study on cavity evolution characteristics of an oblique water-entry structure in the crushed floating ice environment

  • 摘要: 为探究破碎浮冰覆盖密度对结构物入水空泡演化的影响,利用高速摄影技术开展了不同破碎浮冰覆盖密度下结构物倾斜入水实验。此外,通过对比不同碎冰覆盖密度工况下的结构物倾斜入水过程,获得了碎冰覆盖密度对结构物倾斜入水空泡演化特性的影响规律。结果表明:与无冰环境相比,当空泡扩张时,破碎浮冰通过阻碍液面流体向外扩张,致使空泡的直径减小;而空泡闭合时,碎冰会阻碍液面流体向内收缩,延长空泡扩张时间,此时空泡内空气总量增加,空泡内外压差减小,最终导致空泡的闭合时间延迟。随着碎冰覆盖密度的逐渐增加,其对液面流体向内收缩的阻碍作用逐渐增强,进一步延缓了空泡的闭合时间,空泡的长度和最大直径也相应增大。碎冰覆盖密度较小的工况在空泡溃灭时会出现指向空泡内部的射流。此外,碎冰覆盖密度较大的工况下,流体的无规则冲击使得空泡壁出现褶皱。随着结构物入水深度的增加,空泡在环境压力作用下会出现深颈缩现象。随着碎冰覆盖密度的逐渐增大,结构物的水下运动速度相较于无冰环境呈现更快的衰减趋势。
  • 图  1  实验系统示意图

    Figure  1.  Schematic diagram of the experimental system

    图  2  破碎浮冰工况示意图

    Figure  2.  Schematic diagram of different crushed ice conditions

    图  3  实验工况示意图

    Figure  3.  Schematic diagram of the experimental conditions

    图  4  空泡扩张阶段空泡演化图

    Figure  4.  Cavity evolution in the water-entry cavity expansion stage

    图  5  空泡收缩阶段的空泡演化图像

    Figure  5.  Cavity evolution in the cavity contraction stage

    图  6  不同入水条件下的流体特征

    Figure  6.  Flow characteristics under different water-entry conditions

    图  7  空泡闭合阶段的空泡演化图像

    Figure  7.  Cavity evolution in the cavity closure stage

    图  8  空泡溃灭阶段的空泡演化图像

    Figure  8.  Cavity evolution in the cavity collapse stage

    图  9  不同工况下的空泡直径变化曲线

    Figure  9.  Variation curves of cavity diameter under different working conditions

    图  10  不同工况下的空泡长度变化曲线

    Figure  10.  Variation curves of cavity length under different working conditions

    图  11  不同工况下的结构物速度变化曲线

    Figure  11.  Velocity decay curves of the structure under different working conditions

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出版历程
  • 收稿日期:  2024-07-11
  • 修回日期:  2024-09-02
  • 网络出版日期:  2024-09-06

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