Patent ID: 7780415
Filing Date: 2010-08-24
Classification: F01D,F05D

Abstract:
1. A turbine blade, comprising: an airfoil including an airfoil outer wall extending in a span-wise direction radially outwardly from a blade root; a blade tip surface located at an end of said airfoil distal from said root, and said airfoil outer wall including pressure and suction side surfaces joined together at chordally spaced apart leading and trailing edges of said airfoil, said airfoil defining an airfoil cavity forming a cooling system in said blade; at least a first rib positioned in said airfoil cavity to form at least a first generally elongated cooling cavity along at least a portion of said span-wise direction in an area adjacent said trailing edge of said airfoil, said first rib including an upstream side and a downstream side; said first cooling cavity comprising a cavity pressure sidewall and a cavity suction sidewall extending from said downstream side of said first rib; said first rib including at least one orifice extending through said first rib from said upstream side to said downstream side; and wherein said cavity pressure and suction sidewalls define convergent cavity sidewalls relative to said pressure and suction side surfaces of said outer wall.