Passenger plane with joined-wing configuration

Abstract

The invention discloses a passenger plane with a joined-wing configuration. The passenger plane comprises a fuselage, a first front wing, a second front wing, a first rear wing, a second rear wing, a first end plate, a second end plate, a vertical fin and at least one engine, wherein the roots of the first front wing and the second front wing are respectively and fixedly connected with the two sides of the fuselage; the root of the vertical fin is fixedly connected with the rear section of the fuselage; the roots of the first rear wing and the second rear wing are respectively and fixedly connected with the vertical fin; the upper end of the first end plate is connected with the tail of the first rear wing, and the lower end of the first end plate is connected with the tail of the first front wing; the upper end of the second end plate is connected with the tail of the second rear wing, and the lower end of the second end plate is connected with the tail of the second front wing; the engine is arranged at the rear section of the fuselage. The aerodynamic characteristics of the passenger plane are superior to those of the passenger plane with the traditional layout, the passenger plane has higher longitudinal static stability, the structural deformation of the passenger plane is smaller than that of a plane with a single wing, and the structural natural frequency of the passenger plane is higher than that of the plane with the single wing.

Description

technical field [0001] The invention relates to the configuration of a civil aviation passenger aircraft, in particular to a passenger aircraft with a joint wing configuration. Background technique [0002] The induced resistance of a passenger aircraft in the cruising phase accounts for a relatively large proportion of the total resistance, which can reach about 35%. In order to reduce the induced drag and increase the lift-to-drag ratio, a swept wing with a large aspect ratio is often used in the design, but such a wing configuration has low stiffness, which easily leads to an increase in structural weight. However, civil aviation airliners must strictly limit the structural weight. This brings about a contradiction: a large-sweep, high-aspect-ratio wing has good aerodynamic characteristics, a high critical Mach number, and a high cruise lift-to-drag ratio, but poor structural properties, especially low stiffness and large wing tip deformation , if the rigidity is to be ...

AI Technical Summary

Problems solved by technology

This brings about a contradiction: a large-sweep, high-aspect-ratio wing has good aerodynamic characteristics, a high critical Mach number, and a high cruise lift-to-drag ratio, but poor structural properties, especially low stiffness and large wing tip deformation , if you want to increase the stiffness, the weight will be too heavy

[0003] Therefore, the wings of civil aviation airliners in active service have strict restrictions on the aspect ratio, and cannot fully take advantage of the large aspect ratio.

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