跨介质航行器多体分离特性分析

汪帅; 董萌; 王升

doi:10.11993/j.issn.2096-3920.2023-0022

跨介质航行器多体分离特性分析

doi: 10.11993/j.issn.2096-3920.2023-0022

汪帅^1,,
董萌²,
王升¹

1.
中国船舶集团有限公司第705研究所, 陕西西安, 710077
2.
海装驻西安地区第一军事代表室, 陕西西安, 710077

详细信息

作者简介:
汪帅：汪　帅(1992-), 男, 博士, 工程师, 主要研究方向为跨介质航行器总体技术

中图分类号: TJ63; U674.941
计量
- 文章访问数: 44
- HTML全文浏览量: 5
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2023-03-07
- 修回日期: 2023-04-19
- 录用日期: 2023-05-08
- 网络出版日期: 2024-01-29

Analysis of Multi-Body Separation Characteristics of Trans-Medium Vehicles

1.
The 705 Research Institute, China State Shipbuilding Corporation Limited, Xi’an 710077, China
2.
First Military Representative Office of Navy Equipment Department Stationed in Xi’an, Xi’an 710077, China

摘要

摘要: 结合计算流体力学数值仿真和动力学模型仿真对跨介质航行器水下分离舱张开特性进行了研究, 重点分析了分离舱在分离前后不同状态下所受的流体动力。分析结果表明: 1) 在合适外形下, 分离舱可仅在水动力作用下完成与航行器的分离; 2) 分离舱受力主要受张开角大小及张开角速度影响, 不同张开角下的分离力矩产生主要机制不同, 小张开角时分离舱张开主要依靠外表面分离区低压所产生的内外压差, 流体力矩主要依靠分离舱前段产生, 大张开角时则主要依靠水流冲击引起的法向力, 力矩主要依靠分离舱中后段产生; 3) 分离舱张开角较小时分离舱所受流体阻尼力矩极大, 导致分离初始阶段分离舱难以迅速张开, 随着张开角变大, 流体阻尼力矩系数逐渐减小, 分离舱张开角速度迅速变大。因此, 在设计分离舱水下分离时, 应设计合适外形和分离方式来降低分离舱初始流体阻尼力矩。
- 跨介质航行器 /
- 水下分离 /
- 多体分离 /
- 分离舱
Abstract: This paper studied the underwater separation characteristics of pods of trans-medium vehicles by numerical simulations of computational fluid dynamics and dynamics model simulations and analyzed the hydrodynamic forces exerted on the pods before and after separation. The analysis results show that 1) with appropriate shapes, the pods can separate from the vehicle under the action of hydrodynamic forces; 2) the opening angle and opening angular velocity of the pods have a large impact on the hydrodynamic forces. At different opening angles, the generation mechanisms of the separation moment are different. At a small opening angle, the opening of the pods mainly relies on the internal and external pressure difference generated by the low pressure in the outer separation zone, and the fluid moment is mainly generated by the front section of the pods. At a large opening angle, the opening of the pods mainly relies on the normal force caused by water flow impact, and the moment is mainly generated by the middle and rear sections of the pods; 3) the damping moment of the fluid is large when the opening angle of the pods is small, which makes it hard for the pods to separate from the vehicle quickly at the initial stage. As the opening angle increases, the damping moment of the fluid gradually decreases, and the opening angular velocity of the pods rapidly increases. Therefore, appropriate shapes and separation methods should be designed to reduce the initial damping moment of the fluid of the pods during underwater separation.
- trans-medium vehicle /
- underwater separation /
- multi-body separation /
- pod

HTML全文

图 1 跨介质航行器结构示意图

Figure 1. Structure of the trans-medium vehicle

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图 2 计算网格

Figure 2. Computational mesh

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图 3 分离舱内外表面压力沿轴向分布图

Figure 3. Inner and outer axial pressure distributions of the pod

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图 4 张开角0°时流场速度及流线分布图

Figure 4. Flow field velocity and streamline distribution at opening angle of 0°

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图 5 分离舱所受力矩随张开角变化曲线

Figure 5. Curve of moment of pod versus opening angle

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图 6 张开角分别为0.5°和5°时压力分布

Figure 6. Pressure distribution at opening angle of 0.5° and 5°, respectively

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图 7 分离舱力矩随张开角和张开角速度变化曲线

Figure 7. Curves of moment of pod versus opening angle and opening angular velocity

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图 8 阻尼力矩系数随张开角变化曲线

Figure 8. Curve of damping moment coefficient versus opening angle

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图 9 分离舱张开角随时间变化曲线

Figure 9. Curve of opening angle of pod versus time

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图 10 CFD与动力学模型分离舱张开角计算结果对比

Figure 10. Comparison between the simulation results of separating capsules opening angle of CFD and dynamic model

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图 11 CFD与动力学模型分离舱所受力矩计算结果对比

Figure 11. Comparison between the simulation results of separating capsules moment of CFD and dynamic model

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