近场水下爆炸气泡与双层破口结构的相互作用

贺铭; 张阿漫; 刘云龙

doi:10.11883/bzycj-2020-0110

近场水下爆炸气泡与双层破口结构的相互作用

doi: 10.11883/bzycj-2020-0110

哈尔滨工程大学船舶工程学院，黑龙江哈尔滨 150001

基金项目: 国家自然科学基金（11872158）

详细信息

作者简介:
贺　铭（1996－　），男，博士，20140112heming@hrbeu.edu.cn

通讯作者:
张阿漫（1981－　），男，博士，教授，博士生导师，zhangaman@hrbeu.edu.cn

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2020-04-08
- 修回日期: 2020-05-22
- 刊出日期: 2020-11-05

Interaction of the underwater explosion bubbles and nearby double-layer structures with circular holes

College of Shipbuilding, Harbin Engineering University, Harbin 150001, Heilongjiang, China

摘要

摘要: 针对双层结构在水中受到水下爆炸冲击这一问题，利用欧拉有限元数值模型对近场水下爆炸气泡与双层破口结构的相互作用机理进行了研究，分析了舱室涌流及流场演化等规律。首先，通过放电实验对数值模型进行了验证，结果表明,数值结果和实验结果吻合较好；然后，总结了不同破口尺寸、不同起爆位置和不同壳间水位条件下的耦合作用规律。在内部空气、流体惯性以及破口的联合作用下，气泡演化过程中会出现气泡分割现象。当内层破口尺寸系数小于0.5时，内舱室内会出现二次涌流现象，且涌流形态较细长；炸药起爆位置系数小于0.1时，自由液面处会出现破碎和重闭合现象；壳内水位对舱室涌流量的影响作用较为复杂，当水位满舱时，急速涌流会减少船艇的应急时间。
- 双层破口 /
- 水下爆炸 /
- 欧拉有限元方法 /
- 舱室涌流
Abstract: To address the problem of double-structures subjected to underwater explosion, the interaction mechanism between explosion bubbles and double-layer structures with circular hole was studied. And the characteristics such as cabin inrush and flow field change were analyzed by an Eulerian finite element numerical model. First of all, the numerical model was verified through discharge experiments, and it turned out that the numerical results agreed well with the experimental results. Then, the interaction behaviors under different initial conditions were summarized. Under the combined action of internal air, fluid inertia and breach induction, the bubble’s segmentation occurs during the bubble evolution process. When the size coefficient of the inner-layer breach is less than 0.5, the secondary water hump phenomenon occurs in the inner-cabin and the shape of the inrush is slender. When the explosive detonation position coefficient is less than 0.1, the re-closing and breaking of the free surface will take place. The influence of the free surface in the shell on the cabin inrush is complicated and when the water level is full, the rapid surge will reduce the emergency time of the ship.
- double-layer breach /
- underwater explosion /
- Eulerian finite element method /
- cabin inrush

HTML全文

图 1 近场水下爆炸气泡与双层破口结构相互作用示意图

Figure 1. Schematic of interaction between bubble and double breaken structure in near field underwater explosion

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图 2 欧拉有限元方法示意图

Figure 2. Schematic of Eulerian finite element method

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图 3 实验装置图

Figure 3. Picture of experimental device

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图 4 数值结果和实验结果的对比图

Figure 4. The comparison between numerical and experimental results

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图 5 不同时刻气泡的形态和流场压力变化图

Figure 5. The bubble shape and flow field pressure change at different moments

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图 6 不同时刻气泡的形态和流场压力变化图

Figure 6. The bubble shape and flow field pressure change at different moments

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图 7 不同破口尺寸下舱室涌流量随时间的变化曲线

Figure 7. Changes of cabin inrush flow with time under different breach size

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图 8 不同时刻气泡的形态和流场压力变化图

Figure 8. The bubble shape and flow field pressure change at different moments

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图 9 不同起爆位置下舱室涌流量随时间的变化曲线

Figure 9. Changes of cabin inrush flow with time under different detonation position

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图 10 不同时刻气泡的形态和流场压力变化图

Figure 10. The bubble shape and flow field pressure change at different moments

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图 11 不同水位下舱室涌流量随时间的变化曲线

Figure 11. Changes of cabin inrush flow with time at different water levels

下载: 全尺寸图片幻灯片

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