大翼展混合驱动无人水下航行器水动力特性研究

为提高无人水下航行器的操纵性和运动控制算法的高效性,对航行器水的动力特性进行分析尤为重要。基于黏性流体理论,采用高效的计算域分区法提高航行器变攻角网格的生成效率,开展不同攻角和航速下的航行器水动力数值预报与分析,定量给出航行器的升阻力、升阻比和俯仰力矩系数随攻角的变化规律,得到航行器上浮和下潜时对应的最优攻角和动压力中心点偏移量,为航行器的运动的姿态控制提供设计和指导依据。分析攻角对航行器压力场、速度场和涡量场的影响规律,为后续优化航行器构型、提高航行器的水动力性能奠定基础。

Study on hydrodynamic characteristics of Unmanned underwater vehicle driven by large wingspan

In order to improve the maneuverability of unmanned underwater vehicles and the efficiency of motion control algorithms, it is particularly important to determine the hydrodynamic characteristics of aircraft. Based on the theory of viscous fluids, this paper uses the efficient computational domain partitioning method to improve the grid generation efficiency of the aircraft''s variable angle of attack. The numerical simulation and analysis of the hydrodynamics of the aircraft under different angles of attack and speed are carried out, and the a-line rise is given quantitatively. The resistance rise-drag ratio and pitching moment coefficient change with the angle of attack, and the optimal angle of attack and the dynamic pressure center point offset corresponding to the floating and dive of the aircraft are obtained, which provides the attitude control for the motion of the aircraft. Design and guidance basis. The angle of attack on the pressure field, velocity field, vorticity field and influence law of the aircraft is analyzed, which lays a foundation for the subsequent optimization of the aircraft configuration and the improvement of the hydrodynamic performance of the aircraft.