一种可变形跨介质航行器气动/水动特性分析

Aerodynamic and hydrodynamic characteristics analysis of morphing submersible aerial vehicle

由于海水和空气物理性质存在巨大差异,航行器很难以单一外形满足在两种环境下的航行要求。为此,提出一种通过改变外形来实现水空介质跨越的航行器,并通过计算流体力学对其空中和水中两种外形的气动/水动特性进行研究。仿真结果表明,通过改变外形,航行器能够同时满足水下航行和空中飞行的要求。水下航行时,航行器在较小的仰角范围内通过收缩机翼减小阻力;空中飞行时,通过展开机翼增大升力。

Due to the tremendous difference between water and air in physical properties,it＇s hard for a vehicle with fixed shape to meet the requirements of moving underwater and flying in the air. A new vehicle,which has the ability of crossing the water surface for several times through changing its shape,was proposed. The vehicle＇s aerodynamics and hydrodynamics were studied with CFD. The simulation results show that,this new vehicle can meet the requirements of moving underwater and flying in the air through changing its shape. The vehicle retracts its wings to make the drag smaller in a small angle of attack under water and unfolds the wings to make the lift support flying in air.