An aerodynamic configuration of an ultra high aspect ratio aircraft using trailing edge support wings

Abstract

The invention discloses an aerodynamic configuration of a super high aspect ratio aircraft adopting a trailing edge supporting wing, belonging to the technical field of aerodynamic configuration design of the aircraft. Including fuselage, oblique support wing, support rods, straight main wing, forward support wing, engine, propeller, a V-shaped tail wing and tail strut, separating the flat main wing from the fuselage, straight main wings have an aspect ratio greater than 25, when the fuselage is in the horizontal position, the vertical distance between the flat main wing and the oblique support wing is 10% to 40% of the chord length of the flat main wing, and the overlap length between the trailing edge of the flat main wing and the leading edge of the oblique support wing is 0% to 10% ofthe chord length of the flat main wing. By utilizing the aerodynamic configuration provided by the invention, the aspect ratio of the flat main wing can be increased, the problem of insufficient structural rigidity of the ultra-large aspect ratio aircraft can be solved, the payload and structural efficiency of the aircraft can be improved, the lift-drag ratio can be effectively improved, and the structural reliability of the aircraft can be improved. The aerodynamic configuration provided by the invention can increase the aspect ratio of the flat main wing, solve the problem of insufficient structural rigidity of the ultra-large aspect ratio aircraft, and improve the payload and structural efficiency of the aircraft.

Description

technical field [0001] The invention belongs to the technical field of aircraft aerodynamic layout design, and in particular relates to an aerodynamic layout of an aircraft with a super large aspect ratio adopting trailing edge support wings. Background technique [0002] The pursuit of a high lift-to-drag ratio has always been one of the main goals of aeronautical vehicle design. For fixed-wing aircraft with subsonic conventional layout, in order to obtain a higher lift-to-drag ratio during design, the method of increasing the aspect ratio of the wing is usually adopted. The advantage of a wing with a large aspect ratio is that when the flying speed of the aircraft is low, for a wing with the same lift surface area, the use of a larger aspect ratio is beneficial to reduce the induced drag of the wing, so as to obtain a higher lift-to-drag ratio. [0003] However, since the span length of a large aspect ratio wing is much larger than the thickness and chord length of the w...

AI Technical Summary

Problems solved by technology

According to the theoretical knowledge of structural mechanics, when the included angle is small, the supporting force of the supporting wing to the main wing in the vertical direction is small, the bending moment resistance of the main wing with a super large aspect ratio is weak, and the structural rigidity in the span direction is insufficient. It is prone to aeroelasticity and even breaks the main wing

At the same time, the supporting wing will also generate aerodynamic lift and drag, so when it is close to the main wing, its interference with the airflow will also adversely affect the lift-drag characteristics of the main wing

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