| 摘要 |
A turbine rotor blade for use in a gas turbine engine, the rotor blade including a squealer pocket on the blade tip to provide a seal between the blade tip and the outer shroud of the engine. A row of film cooling holes extend along the pressure side wall and the suction side wall of the blade near the tip and discharge film cooling air up and over the blade tip. Associated with each of the film cooling holes is a notch formed on the edge of the tip rail in which each notch is located above a film cooling hole and functions to collect and accelerate the cooling air discharged from the film cooling hole up and into the blade tip. The notches reduce the effective thickness of the blade tip in order to reduce the heat load, and increase the effective convection surface area for the cooling air flow. The notches also function to maintain the film layer of cooling air over the blade tip longer than in the prior art without the notches.
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