Influence of Tube Opening on Internal Trajectory of Underwater Vehicle Launcher with Ejection Mode
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摘要: 为设计合理的水下航行器发射装置筒壁开孔方案, 提高发射效率, 文中采用多对多的交界面技术, 解决了带孔壁面间无间隙滑移的仿真难题, 建立了耦合求解非定常流场和活塞、航行器运动的数值仿真模型。在给定初始条件下, 通过Fluent软件中的二次开发实现了发射装置储能筒壁在不同开孔形状和开孔面积下的航行器发射内弹道仿真, 对模拟流场以及运动曲线进行了分析。结果表明, 水下航行器发射装置储能筒壁开孔形状对出筒效率影响不大, 出筒效率主要受开孔面积的影响, 且随着开孔面积的减小, 出筒效率成指数下降。证明了基于多对多交界面技术的水下航行器发射仿真的可靠性。文中的研究可为弹射式水下发射装置设计提供参考。Abstract: A reasonable tube opening scheme for an underwater vehicle launcher is designed to enhance the emission efficiency. The multi-to-multi interface technology is adopted to solve the simulation difficulty of gapless slipping between walls with holes, and a simulation model is built to couple the unsteady flow field, piston and vehicle movement. According to the given initial condition, the internal trajectory simulation of energy storage tube with different area and shape of the hole is accomplished by secondary development in software Fluent, and the obtained flow fields and the movement curve are analyzed. The results show that the area of hole has significant effect on the out-tube efficiency, while the effect of hole shape can be ignored. The out-tube efficiency decreases exponentially with the decrease of the hole area. The reliability of the underwater vehicle launcher simulation based on multi-to-multi interface technology is proved. This study may provide a reference for the design of underwater vehicle launcher with ejection mode.
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Key words:
- underwater vehicle /
- launcher /
- ejection mode /
- multi-to-multi interface technology /
- energy storage tube /
- opening
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