潜艇大攻角非稳定运动时的水动力计算方法

将艇体看作回转体，在轴线上分布离散的点源模拟艇体，用升力面理论的涡环栅格法模拟附体；用分离涡模型考虑大攻角时的边界层分离效应，并将三维稳定流动的分离问题简化为二维非稳定流动的分离问题。非稳定运动时，结合潜艇六自由度空间运动方程计算水动力，同时预报潜艇的运动。

Predication of Unsteady Hydrodyanamics Charactenistics of Submarines at High Angles of Attack

The hull is defined as a revolution body. The hull volume effects are represented by a series of point source and sinks distributed on the hull axis. Each surface is modeled by using the vortex-lattice lifting surface method. The lee side vortex wake is modeled by discrete vortices in cross-flow planes along the hull. The three-dimensional steady flow problem is reduced to a two-dimensional unsteady separated flow problem for solution. The hydrodynamic prediction method is coupled with a six-degree-freedom equation of motion to predict submarine trajectories