A tiltrotor/lift fan layout for high-speed and long-endurance aircraft

Abstract

The invention discloses an aircraft layout of tilt rotors / a lift fan during high-speed long endurance. The coaxial propeller reversing duct lift fan is mounted at the front part of an aircraft body; the tilt rotors are mounted at the horizontal tail end part of the rear part of the aircraft body in a bilaterally symmetric way; and in the axial direction, the tilt rotors are provided with rotational degrees of freedom within a plane perpendicular to a horizontal tail. The lift fan and the tilt rotors are provided with power by an engine in an aircraft to realize coaxial propeller reversing rotation of the lift fan and tilting of the tilt rotors within a range of 0-(+90) degrees. According to the aircraft layout of the tilt rotors / the lift fan during high-speed long endurance, the duration performance of the aircraft in a fixed wing mode can be effectively improved and the complexity of a control system can be reduced.

Description

technical field [0001] The invention belongs to the field of overall layout design of a high-speed rotorcraft, and in particular relates to the overall layout of a high-speed rotorcraft. Background technique [0002] High-speed rotorcraft is an aircraft that combines the characteristics of vertical take-off and landing of rotorcraft and the characteristics of high-speed and long-distance fixed-wing. It plays an irreplaceable important role and has a very broad application prospect. Since the invention of rotorcraft such as helicopters, it has played a huge role in the field of military and civil aviation. Because the rotor is used to provide lift, it has excellent hovering and low-speed performance, which is its advantage compared with fixed-wing aircraft. Providing lift and overcoming forward flight resistance also limits the improvement of its flight speed. It is difficult to achieve the higher speed and longer range that fixed-wing aircraft can achieve, which is not cond...

AI Technical Summary

Problems solved by technology

If the vertical take-off and landing and cruising mode propulsion is achieved by using the tilting rotor method, two rotors need to be arranged on the wings on both sides, and there must be a large distance from the fuselage. Considering that the internal drive shaft of the wing should not be too large deformation, the wing structure should have greater stiffness, which contradicts the design of the wing with a large aspect ratio, which reduces the lift-to-drag ratio of the whole machine and makes the structure heavier

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