主权项 |
1. A turbine airfoil, comprising:
a generally elongated hollow airfoil formed from an outer wall, and having a leading edge, a trailing edge, a pressure side, a suction side, a root at a first end of the airfoil and a tip at a second end opposite to the first end, and a cooling system positioned within interior aspects of the generally elongated hollow airfoil; at least one trip strip protruding from an inner surface defining a channel of the cooling system, wherein the at least one trip strip is formed from a generally elongated body and wherein the at least one trip strip has a cross-sectional area with at least a first section of an upstream surface of the at least one trip strip being positioned nonparallel and nonorthogonal to the inner surface forming the cooling system channel extending upstream from the at least one trip strip and a concave shaped downstream surface of the at least one trip strip, wherein the downstream surface is concave shaped from a first intersection of the downstream surface and a top surface of the at least one trip strip and a second intersection of the downstream surface and the inner surface defining the channel of the cooling system, wherein an upstreammost point of the downstream surface is positioned upstream from the first and second intersections. |