Modeling and Simulation of Interior Trajectory for Torpedo Expansionary Swim-out Launching
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摘要: 为探讨采用渐扩型自航发射管是否提高了鱼雷出管速度和补水压差引起的附加阻力对鱼雷出管速度的影响程度, 通过对自航管内非常局限性边界条件下鱼雷受力的分析, 建立了渐扩型自航发射管的内弹道模型。结合鱼雷在管内各阶段的运动状态, 对渐扩管引起的流体阻力实时计算, 进行了计算机仿真。通过仿真结果的比较, 证明采用渐扩型自航发射管提高了鱼雷出管的速度, 为以后自航发射装置的设计和改进提供了一定的理论基础, 并通过比较,说明了补水压差引起的附加阻力也是影响鱼雷出管速度的重要因素之一。Abstract: To understand whether the expansionary tube increases the outlet speed of torpedo and how the additional resistance due to pressure difference of seawater compensation influences the speed，a interior trajectory model for torpedo expansionary swim-out launching was set up for analyzing the forces on torpedo under abnormal limitation boundary condition in the expansionary swim-out torpedo tube. Based on the torpedo’s movement in the tube in different phases, computer simulation was conducted to calculate expansionary tube induced flow losses. Comparison of the test and simulation data indicates that the outlet speed of torpedo is increased by adopting the expansionary tube, and the additional resistance due to pressure difference of seawater compensation affects the outlet speed of torpedo. This study may provide a theoretical basis for design and improvement of the swim-out launcher.
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