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FLUTTER AVOIDANCE THROUGH CONTROL OF TEXTURE AND MODULUS OF ELASTICITY IN ADJACENT FAN BLADES
FLUTTER AVOIDANCE THROUGH CONTROL OF TEXTURE AND MODULUS OF ELASTICITY IN ADJACENT FAN BLADES
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机译:通过邻近风扇叶片的纹理和弹性模量控制颤振
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摘要
A fan for a turbofan engine includes a plurality of blades and a disk, the plurality of blades constructed of an anisotropic material, the anisotropic material is a plate, sheet, or forging. A first blade type has a first crystallographic texture and a first natural frequency, and a second blade type has a second crystallographic texture and a second natural frequency. The first natural frequency is at least 4% greater than the second natural frequency, and the first blade type and the second blade type are attached to the disk in an alternating pattern to provide a flutter damping effect. The fan blades may be cut from a plate of the anisotropic material along orthogonal directions or forged from round bar oriented along a first direction and a second orthogonal direction, respectively.
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