Light unmanned helicopter tail rotor aerodynamic appearance

Abstract

The invention provides a light unmanned helicopter tail rotor aerodynamic appearance and belongs to the technical field of helicopter aerodynamic design. The airfoil profile thickness of each tail rotor blade of a helicopter ranges from 10% to 14% from the position A away from the rotation center of the blade to a blade tip, and the torsion rate of each tail rotor blade of the helicopter is X fromthe position B away from the rotation center of the blade to the blade tip, wherein A ranges from 0.31 R to 0.35 R, B ranges from 0.32 R to 0.35 R, X ranges from -8.01 degree / R to -7.99 degree / R, andR is the radius of a circle formed when each tail rotor blade rotates. By the adoption of the design of the light unmanned helicopter tail rotor aerodynamic appearance, the tension capacity of a tailrotor can be improved, meanwhile, the hovering efficiency of the tail rotor in the usable tension range section is improved, the power required by the helicopter tail rotor is reduced, and meanwhilea certain noise reduction effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of helicopter aerodynamic design, in particular to an aerodynamic shape of a light unmanned helicopter tail rotor. Background technique [0002] As a unique anti-torque balance device and control surface for helicopters with a single rotor and a tail rotor, the advanced nature of the tail rotor is directly related to the performance and advancement of the platform, especially the ability to resist crosswinds. Strong technical representation, has become one of the key technologies of helicopter development, and is the focus of research on helicopter design technology at home and abroad. In the aerodynamic scheme design of the tail rotor, the function of balancing the anti-torque is considered, and the design is generally based on the hovering condition. At the same time, the influence of vibration and aerodynamic noise is considered. Carry out key optimization design. The domestic early stage has gone throug...

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Problems solved by technology

In the aerodynamic scheme design of the tail rotor, the function of balancing anti-torque is considered, and the design is generally based on the hovering condition, and the influence of vibration and aerodynamic noise is also considered. Carry out key optimization design. Domestically, manned helicopters have gone through stages of surveying and mapping imitation, reference design, independent innovation, etc., but the aerodynamic layout of the tail rotor of unmanned helicopters still needs to be innovated and broken through.

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