Deformable aircraft leading edge slat and method for designing the same

Abstract

Provided are a deformable aircraft leading edge slat and a method for designing the same. An outer section of the leading edge slat is divided at the 20-40% position of the leading edge slat to form a movable section and a fixed section. The movable section is located at the position of the leading edge of the slat, the fixed section is connected with a main wing section through a leading edge slat sliding rail, and the movable section is connected with the fixed section through a hinge, so that the movable section can be deflected through delta degrees around the fixed section. The air flow separation of the leading edge slat can be effectively delayed, the stall attack angle of an aircraft is increased, the flight border is expanded, and the flight safety is improved. The deformable aircraft leading edge slat improves maximum lifting power of the aircraft at a take-off and landing stage, and accordingly the loading capacity of the aircraft is improved. The aerodynamic load limitation borne by the leading edge slat is reduced too, the design difficulty of the leading edge slat is reduced, the deflection angle of the movable section of the leading edge slat is flexibly adjusted according to the specific requirements of different flight phases, and the deformable aircraft leading edge slat has high task adaptive capability.

Description

technical field [0001] The invention relates to the field of aircraft design, in particular to a deformable leading edge slat for improving aircraft stall characteristics and a design method thereof. Background technique [0002] The combination of leading edge slats, aircraft main wings and trailing edge flaps is the main method for modern aircraft to obtain high lift to complete the takeoff / landing process. In the combined mode of the leading edge slat, the aircraft main wing and the trailing edge flap, the main function of the leading edge slat is: after the leading edge slat is opened, it will form a shape convergence between the leading edge slat and the aircraft main wing, that is, the entrance With wide outlet and narrow slot, the airflow will accelerate and blow out along the tangent direction of the upper surface of the main wing after passing through the slot, which can effectively blow off the low-energy airflow accumulated on the main wing of the aircraft, delay ...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the fixed shape of the slat design in the prior art, the slat cannot change its shape correspondingly with the change of the angle of attack of the incoming flow and the flow pattern of the aircraft to delay the airflow separation. Once the airflow separation occurs, the slat will Cause the aircraft to stall suddenly, endanger the disadvantages of flight safety, the present invention proposes a deformable aircraft leading edge slat and its design method

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