| CPC F01D 5/187 (2013.01) [F05D 2240/305 (2013.01); F05D 2240/306 (2013.01); F05D 2260/202 (2013.01); F05D 2260/22141 (2013.01)] | 21 Claims |
|
1. An airfoil element comprising:
an airfoil wall defining a leading end, a trailing end, a pressure side, a suction side, and a mean line from the leading end to the trailing end that is equidistant from the pressure side and the suction side; and
first and second ribs each connecting the pressure side and the suction side, each of the first and second ribs defining:
a tube portion circumscribing a rib passage; and
first and second connector arms joining the tube portion to, respectively, the pressure side and the suction side,
wherein:
the first rib, the second rib, and the airfoil wall bound a continuous cooling channel therebetween, the continuous cooling channel having a pressure side portion to the pressure side of the mean line and a suction side portion to the suction side of the mean line;
at least one of the pressure side portion and the suction side portion includes a skin passageway between at least one of the respective tube portions of the first rib and second rib and an adjacent portion of an interior surface of the airfoil wall;
said skin passageway has an outer surface formed by said adjacent portion and an inner surface formed by said at least one of the respective tube portions; and
at least one of the outer surface and the inner surface has a plurality of protrusions into the skin passageway.
|