Airplane wingtip device with aligned front edge

Abstract

The invention provides an airplane wingtip device with an aligned front edge, which comprises a transition part and a wingtip part, wherein the inside end of the transition part is connected with the far end of an airplane wing, the outside end of the transition part is connected with the wingtip part, the wingtip part comprises a plurality of wingtip segments, each wingtip segment comprises a wingtip and a wing root, the wing root of the first wingtip segment is connected with the outside end of the transition part and is aligned with the front edge at the outside end of the transition part, the wing root of the (n+1)th wingtip segment is arranged on the wingtip of the nth wingtip segment, and the wing root chord length of the (n+1)th wingtip segment is less than or equal to the wingtip chord length of the nth wingtip segment, wherein n is more than 0. The wingtip device is step-shaped, so that each wingtip is additionally provided with at least one of discontinuity surfaces, the wingtip vortexes induced by the wingtips are restrained with one another, and the vortex intensity is reduced, therefore the airplane wingtip device achieves a damping effect; and the bending moment incremental quantity of each wing root is less, so that the structural weight of the airplane is reduced, and the influence on the buffeting characteristic is less.

Description

technical field [0001] The invention relates to a wingtip device of an aircraft wing. Background technique [0002] The lift required for the aircraft to maintain normal flight is generated by the pressure difference between the upper and lower surfaces of the wing. Due to the existence of the pressure difference between the upper and lower surfaces, the air on the lower surface of the wing near the wingtip will flow around to the upper surface, forming a wingtip vortex, causing the wing The pressure difference between the upper and lower surfaces of the wing in the area near the tip is reduced, resulting in a decrease in the lift generated in this area. [0003] In view of the above problems, winglets (winglets) are usually arranged on the wingtips of the aircraft wings. The main function of the winglets is to increase the effective aspect ratio without increasing the span length of the aircraft. In this way, the two-dimensional effect of the wing is enhanced, the induced ...

AI Technical Summary

Problems solved by technology

[0009] Although the up-trans winglets and wingtip sails have obvious drag reduction effects, both the winglets and the wingtip sails have relatively large bending moments at the root of their wings, which increases their own structural weight, and have some influence on the flutter characteristics of the aircraft

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