Turbine stator vane with root turn purge air hole

摘要

An turbine stator vane for an industrial engine, the vane having a serpentine flow cooling circuit with a first leg located along a leading edge of the vane airfoil and a partition rib separating the first leg from a second leg. A root turn channel connects the first leg to the second leg. A lower end of the partition rib includes a guide vane that directs cooling air from an aft section of the first leg toward a bleed hole for purging an ISSH. A plurality of turning guide ribs located in the aft section of the first leg also directs the cooling air toward the bleed hole.

主权项

1. An air cooled industrial turbine stator vane comprising:
a leading edge region and a trailing edge region; a serpentine flow cooling circuit with a first leg located along the leading edge region of the vane; a partition rib separating the first leg from a second leg of the serpentine flow cooling circuit; a root turn channel connecting the first leg to the second leg of the serpentine flow cooling circuit; a bleed hole located near to a junction between the first leg and the root turn channel that opens into an inter-stage seal housing; and, a lower end of the partition rib having a curvature to direct cooling air from an aft section of the first leg toward the bleed hole.