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Rotor blade for rotary wing aircraft having deformable protrusions to reduce BVI Noiseblade vortex interaction noise
Rotor blade for rotary wing aircraft having deformable protrusions to reduce BVI Noiseblade vortex interaction noise
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机译:用于旋翼飞机的旋翼,具有可变形的突起以减少BVI噪声叶片涡旋相互作用的噪声
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摘要
A rotor blade for a rotary wing aircraft, which rotates about and is combined with a rotation shaft of the rotary wing aircraft. The rotor blade includes a body combined with the rotation shaft and including a leading edge that is a front edge in a direction of rotation; and a plurality of deformable protrusions formed on the leading edge of the body in a radial direction of rotation, and deformable between a first shape protruding forward in the direction of rotation and a second shape not protruding forward in the direction of rotation such that BVI noise generated when a vortex formed near a blade tip collides with the rotor blade is selectively reduced whenever necessary. The deformable protrusions are formed in a region from a point spaced apart from the rotation shaft by 75% of a radius of rotation to a point spaced apart from the rotation shaft by 90% of the radius of rotation.
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