| 摘要 |
The cooling system for the airfoil (12) includes forward and aft cooling circuits (22, 24) supplied with a cooling medium. Both circuits include serpentine passages (36, 38, 46, 48, 50). A central rib (34) divides the forward and aft cooling circuits and includes an opening (70) adjacent the airfoil tip providing a jet of the cooling medium from the forward cooling circuit for impingement against the aft portion of the tip cap (60). The tip cap also includes a thermal barrier coating (62_ along an outside surface thereof as well as on the seat (58) for the tip cap, thereby lowering the tip cap metal temperature and thermally induced stress. |
