一种考虑尾空泡影响的航行体流体动力数值仿真计算模型

文章针对水下垂直发射航行体,建立了一种考虑尾空泡影响的定常水动力数值仿真计算模型,分析了尾空泡对轴向力、附加力及俯仰阻尼力矩的影响。将仿真获得的考虑尾空泡影响的定常水动力系数代入理论弹道模型,预示水下弹道。计算结果表明,采用文中的考虑尾空泡模型及相应的流体动力求解方法获得的流体力系数,用于预示航行体运动参数的变化规律与模型弹射试验结果一致性较好。

A numerical simulation model on studying the hydrodynamics of underwater vehicle considering the effect of tail-bubble

A numerical simulation model on steady hydrodynamics of underwater vehicle during vertical launching is estabished. Using this model, the effect of tail bubble on the axial force, additional force and pitching damping moment is studied. The steady hydrodynamic coefficients with or without the tail bubble are substituted into the theoretical ballistic model. Numerical simulations show that based on the hydrodynam-ic coefficients obtained by the model, the change rule of the parameters of the uderwater vehicle agrees well with the results of the model experiments.