Crossover cooled airfoil trailing edge

摘要

A cooling circuit for a turbine bucket having an airfoil portion includes a trailing edge cooling circuit portion provided with a first radially outwardly directed inlet passage intermediate leading and trailing edges of the airfoil portion of the bucket, extending from a platform portion of the bucket to a location adjacent a radially outer tip of the bucket, and connecting to a second radially inwardly directed passage extending from a location adjacent the radially outer tip to a location adjacent the platform portion. The second radially inwardly directed passage connects to a third trailing edge region passage, and a plurality of crossover passages connect a radially outer half of the second radially inwardly directed passage to a radially outer half of the third trailing edge region passage.

主权项

1. A cooling circuit for a turbine bucket having an airfoil portion comprising: a trailing edge cooling circuit portion including a first radially-oriented passage intermediate leading and trailing edges of said airfoil portion of said bucket, extending from a platform portion of the bucket to a location adjacent a radially outer tip of the bucket for radial outward flow of a cooling medium, and connecting to a second radially-oriented passage extending from a location adjacent the radially outer tip to a location adjacent the platform portion for radial inward flow of the cooling medium, the second radially-oriented passage connecting to a third radially-oriented trailing edge region passage for radial outward flow of the cooling medium; wherein a plurality of crossover passages connect a radially outer half of the second radially-oriented passage to a radially outer half of the third radially-oriented, trailing edge region passage.