Wingtip devices of airplane wings

Abstract

The invention provides wingtip devices of airplane wings. The wingtip devices are symmetrically arranged on wingtip portions of the wings on the two sides of an airplane. At least two wingtip sails are arranged on the outer side of the wingtip portion of the wing on each side. A wingtip sail root of each wingtip sail is in smooth connection with the outer end face of the wingtip portion of the corresponding wing in the length direction of the wing. Each wingtip sail upwards bends and tilts in the length direction of the corresponding wing. The wingtip sail root of each wingtip sail and the outer end face of the wingtip portion of the corresponding wing are sequentially arranged in the width direction of the wing, and the wingtip sail closer to the front edge of the corresponding wing upwards bends and tilts more highly. The fusion type design is adopted, the wingtip sails are in smooth transition connection with the corresponding wings or transition zones, by fully utilizing tight arrangement of the adjacent wingtip sails, air flowing on the upper surfaces of the wingtip sails is slowed down, so that a pressure difference is obtained, and the wingtip vortex intensity is reduced accordingly.

Description

technical field [0001] The invention relates to a wingtip device of an aircraft wing, in particular to a wingtip device for an aircraft main wing. Background technique [0002] like figure 1 As shown in , the traditional wingtip sails are equipped with multiple sails on the wingtips, and these sails can prevent part of the wingtip airflow from forming a rotation, thereby achieving the purpose of weakening the wingtip vortex. However, in the design of the traditional wingtip blade and wingtip device, the integration of the wingtip blade and the wing is not considered, and the wingtip blade is only "inserted" on the wing tip; After aerodynamic design, it is just a simple flat plate, and there is no airfoil design for the sail blade; the sweep angle and skimmer angle are not considered in the shape design of the sail blade. Because the drag reduction effect of traditional wingtip sails is average, this kind of wingtip device is not very suitable for modern civil aircraft. C...

AI Technical Summary

Problems solved by technology

However, in the design of the traditional wingtip blade and wingtip device, the fusion of the wingtip blade and the wing is not considered, and the wingtip blade is only "inserted" on the wing tip; moreover, the sail is not After aerodynamic design, it is just a simple flat plate, and there is no airfoil design for the sail; the sweep angle and skimmer problem are not considered in the shape design of the sail

Due to the general drag reduction effect of traditional wingtip sails, this kind of wingtip device is not very suitable for modern civil aircraft

Images