入水速度对冰孔约束下圆柱体倾斜入水过程的影响分析

鹿麟; 杨哲; 陈凯敏; 程勇东; 杨帅

doi:10.11993/j.issn.2096-3920.2024-0027

入水速度对冰孔约束下圆柱体倾斜入水过程的影响分析

doi: 10.11993/j.issn.2096-3920.2024-0027

鹿麟^{1, 2,},
杨哲^1,,
陈凯敏^1,,
程勇东^1,,
杨帅^1,

1.
中北大学机电工程学院, 山西太原, 030051
2.
重庆长安望江工业(集团)有限责任公司, 重庆, 401120

基金项目: 国家自然科学基金项目(52201385).

详细信息

作者简介:
鹿麟：鹿　麟(1988-), 男, 博士, 副教授, 主要研究方向为结构物高速入水技术

中图分类号: TJ630; U647
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- 被引次数: 0
出版历程
- 收稿日期: 2024-02-21
- 修回日期: 2024-02-29
- 录用日期: 2024-03-26
- 网络出版日期: 2024-04-07

Influence of Water Entry Speed on Oblique Water Entry Process of a Cylinder under Ice Hole Constraint

LU Lin^{1, 2
,},
YANG Zhe^1
,,
CHEN Kaimin^1
,,
CHENG Yongdong^1
,,
YANG Shuai^1
,

1.
School of Mechanical and Electrical Engineering, North University of China, Taiyuan 030051, China
2.
Chongqing Changan Wangjiang Industry(Group) Co., Ltd., Chongqing 401120, China

摘要

摘要: 针对极地环境下超空泡圆柱体入水问题, 基于雷诺平均方程引入流体体积模型, 结合重叠网格技术建立了冰孔约束下圆柱体入水数值仿真方法。在此基础上, 开展不同入水速度下圆柱体穿越冰孔入水过程仿真, 分析了圆柱体入水过程中的空泡演化与载荷特性。研究结果表明: 冰孔约束限制了孔内水域的流动, 进而改变了表面喷溅的状态及空泡壁的形态, 以至延迟了空泡表面闭合时间。随着入水速度的增大, 冰孔约束对空泡形态的限制作用基本一致, 圆柱体头部出现了更大范围的高压区域, 且呈现出非对称分布; 冰孔约束增大了圆柱体入水冲击载荷, 使得圆柱体水下速度加快衰减, 并促使圆柱体偏转角度大于无冰工况。研究结果可为极地超空泡武器入水稳定性提供参考。
- 超空泡 /
- 冰孔约束 /
- 倾斜入水 /
- 入水冲击载荷 /
- 空泡演化
Abstract: For the water entry problem of supercavitating cylinders in polar environments, a numerical simulation method for the water entry of the cylinder under ice hole constraint was established based on the Reynolds time-averaged Navier-Stokes equations, volume of fluid model, and overlapping mesh technique. On this basis, the simulation of the water entry process of the cylinder through the ice hole at different water entry speeds was carried out, and the cavity evolution and load characteristics of the cylinder in the water entry process were analyzed. The results show that ice hole constraint restricts the flow of water inside the ice hole, which in turn alters the surface splashing and the shape of the cavity wall, thus delaying the surface closing of the cavity. The limiting effect of the ice hole constraint on the cavity shape is essentially the same as the water entry speed increases. The cylinder head appears to have a larger area of high pressure, showing an asymmetric distribution. In addition, the ice hole constraint increases the water entry impact load of the cylinder, which accelerates the underwater speed decay of the cylinder and contributes to a larger deflection angle of the cylinder than in the ice-free condition. The research results can provide some reference for the water entry stability of polar supercavitating weapons.
- supercavity /
- ice hole constraint /
- oblique water entry /
- water entry impact load /
- cavity evolution

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图 1 圆柱体数值模型

Figure 1. Numerical model of the cylinder

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图 2 冰板数值模型

Figure 2. Numerical model of the ice-plate

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图 3 计算域网格划分示意图

Figure 3. Schematic diagram of the grid division of computational domain

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图 4 计算模型设置

Figure 4. Settings of the calculation model

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图 5 入水条件设置

Figure 5. Setting of water entry conditions

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图 6 不同网格密度下速度衰减曲线

Figure 6. Curves of velocity attenuation under different grid densities

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图 7 数值模型验证

Figure 7. Validation of the numerical model

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图 8 实验与仿真结果相对误差图

Figure 8. Relative error between experimental and simulation results

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图 9 入水空泡演化过程

Figure 9. Cavity evolution of the water entry process

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图 10 不同工况下入水空泡演化过程

Figure 10. Cavity evolution of the water entry process under different conditions

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图 11 压力场分布特性

Figure 11. Distribution characteristics of pressure field

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图 12 速度矢量对比

Figure 12. Comparison of velocity vector

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图 13 流场动力特性

Figure 13. Dynamic character of flow field

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图 14 入水初期受力示意图

Figure 14. Schematic diagram of force at initial water-entry stage

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图 15 无冰与冰孔约束下圆柱体受力对比

Figure 15. Comparison of forces on ice-free and ice-hole constrained cylinder

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参考文献(10)

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