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US 2023/0184117 A1Published application
Airfoil vibration damping apparatus
AssigneeGeneral Electric Company
InventorsLi Zheng, Nicholas J. Kray, Changjie Sun
Life of this patent
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Abstract
Airfoil vibration damping apparatus are disclosed. An example apparatus includes a metallic airfoil including a cavity, and a dilatant material disposed in the cavity to dampen vibrations of the metallic airfoil.
Claims20
An apparatus comprising:
- a metallic airfoil including a cavity;
- and
- a dilatant material disposed in the cavity to dampen vibrations of the metallic airfoil.
A turbofan engine comprising:
- a hollow fan blade;
- a shear-thickening fluid disposed in the hollow fan blade, the shear-thickening fluid including a first viscosity in response to encountering a first shear strain, the shear-thickening fluid including a second viscosity greater than the first thickness in response to encountering a second shear strain, wherein the first shear strain does not satisfy a threshold, and wherein the second shear strain satisfies the threshold;
- and
- a wear-resistant coating between the shear-thickening fluid and an interior surface of the hollow fan blade.
1 more element
An apparatus comprising:
- means for producing aerodynamic forces;
- means for thickening in response to encountering shear forces, the means for thickening to change from a first thickness to a second thickness greater than the first thickness in response to encountering a shear strain that satisfies a threshold to dampen vibrations encountered by the means for producing aerodynamic forces;
- and
- means for resisting wear between the means for thickening and the means for producing aerodynamic forces.
1 more element
Dependencies are inferred from the claim text.