| 摘要 |
A turbine blade with single tip rail located on the suction side of the tip, and a plurality of curved diffusion holes to discharge cooling air onto the pressure side wall and the tip floor or tip corner of the blade to provide cooling and to limit leakage of the hot gas flow through the tip gap. The curved diffusion holes are curved in an upward direction toward the tip, and each includes a metering hole with an inlet axis normal to the cooling supply cavity surface. A suction side tip rail is flush with the backside wall and slants outward toward the front edge on the inner side. A first curved diffusion hole opens onto the pressure side wall just below the tip corner, a second curved diffusion hole opens adjacent to the tip corner, and a third curved diffusion holes opens onto the tip floor adjacent to the tip corner and at a midpoint between the tip corner and the tip rail. The second diffusion hole provides a layer of film cooling air to the forward side of the tip corner where the first layer of film cooling air does not come into contact so that the entire tip floor is covered by layers of film cooling air.
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