协同射流对仿生扑翼前缘涡的影响机理

The Natural flyer use the flapping-wing flight manner to obtain the extremely high ability. An important reason for efficient flapping flight is to make full use of the leading edge vortex energy. Co-flow jet is proposed in recent years as a new flow control technology, which can effectively enhance the fixed wing aircraft on the leading edge vortex, can significantly improve the lift and decrease drag at the same time. This project will be based on the principle of co-flow jet and research its influence on bionic flapping-wing. It will be explored that the influence of co-flow jet on the mechanism of the flapping wing leading edge vortex structure, and the airfoil parameters and coordinated interaction of the jet parameters of the law. The relationship between stability of the leading edge vortex and the flight parameters should be revealed, also the mechanism of the leading edge vortex on the flight. Using co-flow jet technology can control and make the leading edge vortex steadier. The synergy effect of co-flow jet on leading edge vortex structure and the evolution process will be revealed. Furthermore, the co-flow jet technology on the efficiency of the bionic flapping wing aerodynamic will be explored. The theory basis to improve aerodynamic efficiency by the surface flow control technology of bionic flapping wing will be established.

生物采用扑翼飞行方式取得了极高的飞行能力，一个重要原因在于充分利用了前缘涡的能量。协同射流是近年来提出的一种新的流动控制技术，可有效增强固定翼飞行器前缘涡，从而大幅度提高升力并同时减小阻力。本项目将协同射流引入仿生扑翼的研究，探索其对扑翼前缘涡结构和演变的影响机理，探究扑翼外形参数、运动参数与协同射流参数的相互影响规律，寻找前缘涡的稳定性与飞行参数的内在联系，揭示前缘涡在飞行中的影响机理。利用协同射流实现表面流动控制技术稳定扑翼扑动过程中产生的前缘涡，进而探索协同射流技术对仿生扑翼气动效率的影响效果，为表面流动控制技术在仿生扑翼飞行器上的应用及其改善气动效率的探索奠定理论基础。

飞行生物均采用扑翼飞行方式，具有极高的飞行能力和飞行效率，研究人员发现其高效飞行的一个重要原因在于充分利用了前缘涡的能量。协同射流是近年来提出的一种新的流动控制技术，通过有效增强固定翼的前缘涡，可大幅度提高升力并同时减小阻力，甚至产生负阻力。本项目将协同射流引入仿鸟尺度扑翼的研究，探索其对扑翼前缘涡结构和演变的影响机理，探究了扑翼的多项参数与协同射流参数的相互影响。研究了扑翼参数与射流参数的内在联系，揭示了前缘涡在飞行中的影响机理。利用协同射流实现表面流动控制技术稳定扑翼扑动过程中产生的前缘涡，进而探索了协同射流技术对仿生扑翼气动效率的影响效果，为表面流动控制技术在仿生扑翼飞行器上的应用及其改善气动效率的探索奠了定理论基础。研究表明，协同射流可以有效减小阻力，增加升力，并稳定扑翼的前缘涡。对于扑翼上下表面布置合适的射流，并对射流参数进行动态设计，可以进一步提升扑翼气动性能，提高气动效率。