Patent ID: 6991430
Filing Date: 2006-01-31
Classification: F01D,F05D

Abstract:
1. A turbine blade comprising: an airfoil including an airfoil outer wall extending longitudinally outwardly from a root, pressure side and suction sides extending laterally from a leading edge to a trailing edge of the airfoil, a squealer tip at a radially outer end of the airfoil, the squealer tip including a radially outer tip cap attached to the airfoil outer wall, a continuous squealer tip wall extending radially outwardly from and continuously around the tip cap forming a radially outwardly open tip cavity, a recessed tip wall portion recessed inboard from the pressure side of the airfoil outer wall forming a tip shelf therebetween, an internal cooling circuit extending longitudinally outwardly from the root to the tip cap bounded in part by the recessed tip wall portion, and a plurality of film cooling shelf holes disposed through the tip shelf and extending through the recessed tip wall portion directly into the internal cooling circuit and spaced away from a junction between the recessed tip wall portion and the tip shelf.