水下航行体纵平面机动非定常水动力计算

Calculation on Submerged Body Unsteady Hydrodynamic with Movement in the Longitudinal Plane

非定常水动力准确计算是进行水下航行体弹道设计和机动性设计的前提。基于非定常三维不可压缩流体动力理论,建立水下航行体在纵平面内作机动运动时流体动力计算模型。利用多个动域对接的动网格技术实现航行体在纵向平面变速度平动和变角速度俯仰运动。计算结果表明,在保证网格质量的前提下,航行体的非定常流体动力可以通过计算模型获取。建模方法可以为其他类型航行体非定常流体动力的计算所借鉴,具有工程应用价值。

The unsteady hydrodynamic accurate calculation is the premise of submerged body trajectory de- sign and maneuverability design. Based on unsteady three-dimensional incompressible fluid dynamics theo-ry, calculation model of submerged body unsteady hydrodynamic with the movement in the longitudinal plane was established. Variable speed translational and variable angular velocity of the pitching motion in the longitudinal plane of submerged body was achieved by dynamic mesh method. The unsteady hydrody- namic can be obtained by model under the premise of good quality grid by the results. Modeling methods can learn from other similar problems, which has engineering application value.