A high-efficiency low-noise bionic propeller for an unmanned aerial vehicle belongs to the field of manufacturing of propellers for unmanned aerial vehicles and comprises a propeller hub, a left propeller blade and a right propeller blade, the left propeller blade comprises a propeller blade I and a blade tip and wingtip bionic structure II, and the blade tip and wingtip bionic structure II comprises a small wing 1, a small wing 2 and a small wing 3. The right propeller blade and the left propeller blade are the same in structure, the airfoil profile curve of the propeller blade I is obtained by fitting the airfoil profile curve of the long-eared owl wing, a large lift-drag ratio can be generated, and the efficiency of the propeller blades is improved; the blade tip wingtip bionic structure II imitates a wingtip structure when long-eared owl glides, the lengths and the upwarp heights of the three winglets are sequentially increased, the induced resistance when the propeller blade rotates and flies is effectively reduced, wingtip large vortexes in a flow field are weakened into small vortexes, aerodynamic noise generated by vortex separation is restrained, the flight efficiency is further improved, and noise is further reduced.
用于无人机的高效率低噪声仿生螺旋桨属无人机用螺旋桨的制造领域,本发明由桨毂、左螺旋桨叶和右螺旋桨叶组成,左螺旋桨叶由桨叶Ⅰ和叶尖翼梢仿生结构Ⅱ组成,叶尖翼梢仿生结构Ⅱ由1、2、3三个小翼组成,右螺旋桨叶与左螺旋桨叶结构相同,桨叶Ⅰ翼型曲线由长耳鸮翅翼翼型曲线拟合所得,可产生较大的升阻比,提高桨叶的效率;叶尖翼梢仿生结构Ⅱ仿照长耳鸮滑翔时的翼梢结构,三个小翼长度和上翘高度依次增大,有效降低螺旋桨叶旋转飞行时的诱导阻力,流场中的翼尖大涡流被削弱为小涡流,抑制涡流脱离产生的气动噪声,进一步提高飞行效率和降低噪声。
High-efficiency low-noise bionic propeller for unmanned aerial vehicle
一种用于无人机的高效率低噪声仿生螺旋桨
2023-08-01
Patent
Elektronische Ressource
Chinesisch
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