Shearing variable sweepback airfoil and design method thereof

Abstract

The invention provides a shear variable sweepback airfoil and a design method thereof, the airfoil comprises an inner wing and an outer wing, the inner wing is fixed with a fuselage; the outer wing comprises at least three parallel beams and a plurality of wing ribs arranged among the beams, the wing ribs are connected with the beams through pin shafts, and the wing ribs and the beams rotate around the pin shafts; one end of the outer wing extends into the inner wing, each beam is assembled on a rotating shaft fixed with the inner wing, and the plurality of rotating shafts are linearly arranged along the incoming flow direction; and one beam extends into the machine body and is connected to a driving mechanism. The wing ribs are always kept parallel to the incoming flow direction in the variable sweepback process, that is, the wing sections are always kept parallel to the incoming flow direction, the good aerodynamic characteristics of the wing sections are kept, and it is guaranteed that the aircraft has the high aerodynamic efficiency and the low-resistance characteristic in the different sweepback angle states in the flight process.

Description

technical field [0001] The invention belongs to the technical field of variant aircraft, and in particular relates to a shear variable swept airfoil and a design method thereof. Background technique [0002] Variant aircraft can change its shape according to different flight environments and tasks to obtain optimal aerodynamic performance and reduce energy consumption, so as to meet the requirements of performing various tasks such as cruise, maneuver, attack, etc. at different flight speeds and altitudes. Improve the performance indicators of the aircraft. The main deformation parts of the variant aircraft include wing surfaces and engine inlets. [0003] At present, the variable-sweep wing aircraft through flight tests at home and abroad mainly adopts the rotary variable-sweep, such as the F-14 of the United States and the TU-160 of the Soviet Union. The disadvantage of the rotary variable-sweep wing is that the airfoil is parallel to the direction of incoming flow in a ...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problem in the prior art that the airfoil and the incoming flow direction are sometimes not parallel in the process of rotating the variable-sweep wing, the present invention provides a shear-variable-sweep airfoil and its design method, which can realize the During the sweep angle, the airfoil is always parallel to the direction of incoming flow, avoiding the loss of lift-drag characteristics of the airfoil

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