| 摘要 |
PROBLEM TO BE SOLVED: To extend effective life of a rotor blade for a gas turbine engine. SOLUTION: A rotor blade 40 includes a platform 62 including a radially outer surface 152 and a radially inner surface 144. An airfoil 60 extends radially outward from the platform. A shank 64 extends radially inward from the platform. A dovetail 66 extends from the shank in such a manner that an internal cavity 84 is defined at least partially by the airfoil, the platform, the shank, and the dovetail. A cooling circuit 140 extends through a portion of the shank for supplying cooling air from the cavity for impingement cooling of the platform radially inner surface. COPYRIGHT: (C)2005,JPO&NCIPI |
