| 摘要 |
A fan blade comprises a root portion and an aerofoil portion. The aerofoil portion has a leading edge, a trailing edge and a tip remote from the root portion. A concave pressure surface extends from the leading edge to the trailing edge and a convex suction surface extends from the leading edge to the trailing edge. A portion of the tip of the aerofoil portion between the leading edge and the trailing edge of the aerofoil portion is thinner than the remainder of the tip. The portion of the tip of the aerofoil portion is spaced from the leading edge and is spaced from the trailing edge. The portion of the tip of the aerofoil portion has a recess such that the portion of the tip of the aerofoil portion is thinner than the remainder of the tip. The recess is arranged on the concave pressure surface of the aerofoil portion. This reduces vibrations of the fan blade.
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