Patent ID: 9017025
Filing Date: 2015-04-28
Classification: F01D,F05D

Abstract:
1. A turbine airfoil with a radial span, comprising: a serpentine cooling circuit comprising an axial progression of interconnected radial channels between T-shaped partitions that have respective base portions extending from alternate pressure and suction side walls of the airfoil, and have respective crossing portions that bound respective near-wall passages adjacent to the suction and pressure side wall opposite the base portion, wherein the T-shaped partitions each have a “T” shape in a plane transverse to the radial span, and a first one of the channels in a flow sequence order is a radial feed channel, and further comprising a generally J-shaped partition with an end extending forward from an external wall of the airfoil aft of a last one of the T-shaped partitions in the flow sequence, wherein the end of the generally J-shaped partition axially overlaps the crossing portion of the last T-shaped partition.