Rotor blade structure design capable of inhibiting rotation chattering of tilt rotor
A technology of tilting rotorcraft and rotor blades, which is applied in the direction of rotorcraft, motor vehicles, aircraft, etc., can solve the problems of increased wing waste resistance, increased wings, reduced efficiency and performance of the tilting rotorcraft, and achieves suppression Rotary chatter, the effect of increasing the speed of the rotary chatter
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[0040]In this example, aiming at the semi-extended wind tunnel model of XV-15 tiltrotor, the proposed rotor blade configuration is used to suppress the rotary flutter. The rotor used in this model is a universal hinged rotor, the rotor speed Ω=458r / min, the rotor radius R=3.82m, and there are 3 blades in total. The blade has nonlinear negative torsion, the root torsion angle is 0°, and the tip torsion angle is -45°; the chord length of the blade is 356mm, the airfoil at the root of the blade is NACA64-935a=0.3, and the airfoil at the end of the blade is NACA64-208a=0.3. In this example, the position, torsion angle, and blade airfoil of the girder 4 are kept unchanged, and only the part near the blade tip is improved. figure 1 The radial starting point of the blade deflection is located at 0.75R from the center of rotation. The distance between the midchord deflection point 13 and the airfoil leading edge point 12 of the B-B section at the blade tip is 50% of the chord length...
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