| 摘要 |
PROBLEM TO BE SOLVED: To provide a cooling circuit for a turbine bucket (10) having a shank (14), a platform (18) and an airfoil (12).SOLUTION: The cooling circuit includes a first cooling passage (38) extending from an inlet (20) located at a radially inward end of the shank (14) and adapted to communicate with a turbine wheel-space, the first cooling passage (38), in use, supplying cooling air to a serpentine cooling circuit (24) extending within and across at least one region of the platform (18). The serpentine cooling circuit (24) connects with a separate internal cooling circuit in the airfoil (12), such that the cooling air used to cool the platform (18) is re-used in the airfoil cooling circuit. |
