| 摘要 |
An internally cooled airfoil includes film cooling holes extending through an expanded section of the wall. Various construction details are developed which provide long film cooling holes resulting in convective cooling and film cooling of the outer surface of the airfoil downstream of the cooling hole. In a particular embodiment, the airfoil includes a wall having an expanded section and a canted shaped cooling hole. The shaped cooling hole includes a metering section having a length L2 and a diffusing section having a length L3. The expanded section has a thickness Te, measured along the direction of the cooling hole, sufficient to accommodate the total length L1 of the cooling hole.
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