自航发射鱼雷内弹道模型与仿真

Modelling and Simulation of Interior Trajectory for Torpedo Swim-out Launching

为探讨现役潜艇鱼雷发射管自航发射534口径鱼雷的可能性,针对现役发射管环形间隙截面积与鱼雷横截面之比较小的实际情况,综合考虑了各种阻力的影响,分析了等截面管自航发射过程,定义并引入了补水压差作为阻力因素,重新建立了内弹道模型。根据自航管内非常局限性边界条件,结合鱼雷在管内各阶段的运动状态,实时计算了补水压差阻力和其他流体阻力,并进行了计算机仿真。比较仿真和试验结果,验证了内弹道模型,并证明了利用现役潜艇鱼雷发射管自航发射534口径鱼雷是不可行的。

In order to discuss the possibility of torpedo （diameter： 534 mm） swim-out launching by the submarine torpedo tube in service, an interior trajectory model was set up in consideration of different resistances and the fact that the area ratio of the circular clearance cross-section of torpedo tube in service to the torpedo cross-section is small. The pressure difference of seawater compensation was defined and added to the model as a resistance parameter, and the launching process was analyzed. Based on the abnormal limited boundary condition in the swim-out torpedo tube, simulation was conducted to calculate the resistances of pressure difference and the flow losses according to different movement phases of torpedo in the constant section tube. Comparison of the test and simulation data verified the validity of the mathematical trajectory model, and proved that the current submarine torpedo tube could not launch the 534 mm torpedo.