| 摘要 |
<p>A cooled airfoil (32) includes a concave pressure wall (42) extending radially from a base to a tip of the airfoil, a convex suction wall (44) connected to the concave pressure wall at a leading edge (46) and a trailing edge (48) spaced axially from the leading edge, and cooling channels extending radially between the base and the tip of the airfoil between the concave pressure wall and the convex suction wall and configured to receive a cooling fluid supply through the base of the airfoil. The cooling channels include a leading edge channel (52), a trailing edge channel (54), a serpentine cooling circuit, and a dedicated up-pass channel (58). The serpentine cooling circuit includes a first up-pass channel (56a) forward of the trailing edge channel and configured to be in flow communication with a supply channel through the base of the airfoil, a down-pass channel (56b) forward of and in flow communication with the first up-pass channel, and a second up-pass channel (56c) forward of and in flow communication with the down-pass channel. At least the down-pass channel (56b) and the second up-pass channel (56c) of the serpentine circuit have a generally triangular transverse cross-sectional shape. The dedicated up-pass channel (58) is arranged between the leading edge channel (52) and the second up-pass channel (56c) of the serpentine cooling circuit.</p> |
