分层流中潜艇加减速对尾迹特征特性的影响

于祥; 胡开业

doi:10.19693/j.issn.1673-3185.02490

分层流中潜艇加减速对尾迹特征特性的影响

doi: 10.19693/j.issn.1673-3185.02490

于祥,
胡开业^,

哈尔滨工程大学船舶工程学院，黑龙江哈尔滨 150001

基金项目: 国家自然科学基金资助项目（51779053）

详细信息

作者简介:
于祥，男，1995年生，硕士生。研究方向：计算流体力学。E-mail：1030279961@qq.com

胡开业，男，1980年生，博士，副教授。研究方向：舰船水动力和潜航体非声隐身。E-mail：hukaiye@hrbeu.edu.cn

通信作者:
胡开业

中图分类号: U661.1
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出版历程
- 收稿日期: 2021-08-12
- 修回日期: 2021-09-09
- 网络出版日期: 2022-06-09
- 刊出日期: 2022-06-30

Influence of submarine's acceleration and deceleration on wake spectrum characteristics in stratified flow

YU Xiang,
HU kaiye^,

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

分层流中潜艇加减速对尾迹特征特性的影响由于祥，等创作，采用知识共享署名4.0国际许可协议进行许可。

摘要

摘要: 目的旨在研究分层流中潜艇加减速对尾迹特征特性的影响规律，为潜艇尾迹隐身提供理论依据。方法应用CFD技术，首先验证该技术模拟潜艇运动对自由面兴波的准确性，再基于自由面兴波与其辐聚辐散场、内波速度场进行分析，对实尺度潜艇进行加减速航行模拟。通过对自由面速度场求散度，深入研究潜艇加、减速对自由面及跃层的影响。结果研究表明：潜艇进行非定常运动时，尾流场横波、散波分布规律较匀速运动截然不同，其兴波夹角增减约10%~25%，且兴波峰值位置明显前置与后置，结合波高及速度散度场得到潜艇加、减速造成自由表面辐聚辐散效应的差异。结论当潜深和分层模式等相同，潜艇减速时，可降低尾流场扰动、兴波高度及其粗糙度，加速状态可显著增加潜艇近场扰动与被探测概率。
- 分层流 /
- 机动操纵 /
- 尾流场 /
- 合成孔径雷达 /
- 辐聚辐散
Abstract: Objectives This paper seeks to grasp the influence of a submarine's acceleration and deceleration on its wake spectrum characteristics in stratified flow, and provide a theoretical basis for submarine stealth. Methods The accuracy of CFD technology in simulating the motion of the submerged body making waves on the free surface is first verified, and then analyses are made of the wave-making on the free surface, its convergence and divergence field, and internal wave velocity field under the acceleration and deceleration of a real-scale submarine. By calculating the divergence of the velocity field of the free surface, the influence of submarine acceleration and deceleration on the free surface and jump layer is determined in depth. Results The results show that when the submarine is in unsteady motion, the shear wave and scattered wave distribution of the wake field are completely different from those under uniform motion. Combining the wave height and velocity divergence field, the acceleration and deceleration of the submarine causes the free surface convergence and divergence effect. Conclusions When the submarine depth and stratification mode are the same, the wake field disturbance, wave height and roughness can be reduced when the submarine decelerates, and the acceleration state can significantly increase the probability of near-field disturbances leading to the detection of the submarine.
- stratified flow /
- maneuver /
- wake field /
- synthetic aperture radar (SAR) /
- convergence and divergence

HTML全文

图 1 Rankine卵形体三维模型

Figure 1. Three-dimensional model of Rankine ovoid

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图 2 卵形体计算域网格划分

Figure 2. Meshing of computational domain for ovoid

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图 3 数值模拟验证

Figure 3. Numerical simulation verification

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图 4 潜艇计算模型

Figure 4. Submarine computational model

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图 5 潜艇计算域网格划分

Figure 5. Meshing of computational domain for submarine

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图 6 不同网格数自由面兴波

Figure 6. Free surface wave-making with different grid numbers

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图 7 内界面兴波

Figure 7. Wave-making of the internal interface

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图 8 自由面兴波

Figure 8. Free surface wave-making

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图 9 自由面兴波截面

Figure 9. The cross-section of free surface wave-making

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图 10 自由面辐聚辐散强度

Figure 10. Free surface convergence-divergence intensity

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图 11 垂向速度场分布

Figure 11. Distribution of vertical velocity field

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图 12 内界面速度场分布

Figure 12. Distribution of internal interface velocity field

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表 1 计算工况

Table 1. Calculation cases

工况	分层形式	速度区间/kn	加速时间/s	运动状态	潜深/m
A1	强分层	12	0	匀速	20
A2	强分层	16	0	匀速	20
A3	强分层	20	0	匀速	20
B1	强分层	12~16	40	匀加速	20
B2	强分层	16~12	40	匀减速	20
B3	强分层	12~20	40	匀加速	20
B4	强分层	20~12	40	匀减速	20

下载: 导出CSV

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