CPC F01D 5/187 (2013.01) [F01D 5/141 (2013.01); F01D 5/20 (2013.01); F01D 5/3007 (2013.01); F05D 2220/323 (2013.01); F05D 2240/307 (2013.01); F05D 2260/201 (2013.01); F05D 2260/202 (2013.01); F05D 2260/205 (2013.01)] | 16 Claims |
1. An airfoil having a rotational axis and comprising:
a body defining an interior, and extending axially between a leading edge and a trailing edge to define a chord-wise direction and radially between a root and a tip to define a span-wise direction, which terminates in a tip end wall and a tip rail extending from the tip end wall, with the tip rail having:
an exterior surface extending between a first surface, a second surface, and a third surface that interconnects the first surface and the second surface, the third surface defining a distal end of the tip rail with respect to the rotational axis;
a cooling passage formed in the interior;
a set of radially-spaced cooling cavities formed within the tip rail and including a first cooling cavity, a second cooling cavity and a third cooling cavity, the set of radially-spaced cooling cavities being spaced with respect to an exterior surface of the tip rail;
a cooling conduit fluidly coupling the cooling passage with the first cooling cavity;
a first connecting conduit fluidly coupling the first cooling cavity to the second cooling cavity;
a second connecting conduit fluidly coupling the second cooling cavity to the third cooling cavity; and
a film hole having an inlet fluidly coupled to at least one cooling cavity of the set of radially-spaced cooling cavities and an outlet provided on the exterior surface of the tip rail;
wherein the second connecting conduit and the cooling conduit are located along a local plane extending in the span-wise direction, the local plane extending between the first surface and the second surface of the tip rail, the local plane further intersecting both the second connecting conduit and the cooling conduit.
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