仿生类鱼鳍翼力学性能的数值研究

Numerical study on mechanical properties of bionomic fin-like wing

为了研究仿生类鱼鳍翼的流动控制机理,通过数值求解不可压缩流动非定常N-S方程,对类鱼鳍翼和传统机翼在不同运动方式下的力学性能和流动机理进行对比分析.研究结果表明:与传统翼相比,尽管在来流中静止的仿生类鱼鳍翼会增加阻力,但其在做拍动运动时产生的复杂涡系可以改善压强分布,增强前缘吸力,提高推力.

In order to study the flow control mechanism of a bionomic fin-like wing,the hydrodynamic performance and flow mechanism of a fin-like wing and a traditional wing in different motion modes were compared and analyzed by solving unsteady N-S equations of incompressible flow.The results show that the drag of the fin-like wing is larger than that of the traditional wing.However,the thrust of the fin-like wing is much larger than that of the traditional wing in flapping motion because com-plex vortices generated in the grooves of the fin-like wing can not only improve the pressure distribution but also enhance the leading-edge suction.