A continuously variable bending structure at the leading edge of an airfoil

Abstract

The invention discloses a wing leading edge continuous bending structure, and belongs to the technical field of design of wing leading edge structure. The structure includes that two ends of each fixed wing rib are respectively fixed on upper flexible skin and lower flexible skin; a memory alloy rod assembly passes through the fixed wing ribs, one end is fixed on the fixed wing ribs, and the otherend is slidingly connected with a wing leading edge; follow-up wing ribs are evenly distributed up and down along the memory alloy rod assembly, one end of each follow-up wing rib is connected with the memory alloy rod assembly, and the other end of each follow-up wing rib is slidingly connected with the upper flexible skin or the lower flexible skin; the memory alloy rod assembly is provided with first memory alloy rods and second memory alloy rods; a deformation temperature of the first memory alloy rods is Ta, and after a heating temperature reaches Ta, the first memory alloy rods performbending deformation; a deformation temperature of the second memory alloy rods is Tb, and after a heating temperature reaches Tb, the second memory alloy rods perform straight deformation; after the memory alloy rod assembly is heated, the follow-up wing ribs are driven to move to make the upper flexible skin and the lower flexible skin bended and deformed, and thus the aerodynamic shape of the wing outer edge is changed.

Description

technical field [0001] The invention belongs to the technical field of wing leading edge structure design, and in particular relates to a wing leading edge continuously variable bending structure. Background technique [0002] Leading edge flaps are usually arranged at the front of the aircraft wing. In the high angle of attack flight state, the deflection movement of the leading edge flaps can effectively delay the occurrence of stall, increase the maximum lift coefficient, and improve the aerodynamic performance of the aircraft. [0003] The leading edge flap of the existing aircraft is connected to the front of the wing by hinges or slide rails. There are obvious discontinuous inflection points and step gaps between the flap and the wing. When the airflow passes by, it is easy to separate. It affects the aerodynamic efficiency of the aircraft to a certain extent, and causes wing buffeting, which reduces the flight control quality of the aircraft. Contents of the inventi...

AI Technical Summary

Problems solved by technology

[0003] The leading edge flaps of existing aircraft are connected to the front of the wing by hinges or slide rails. There are obvious discontinuous inflection points and step gaps between the flaps and the wings, and the airflow is prone to separation when passing by. It affects the aerodynamic efficiency of the aircraft to a certain extent, and causes wing buffeting, which reduces the flight control quality of the aircraft

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