Patent ID: 7066716
Filing Date: 2006-06-27
Classification: F01D,F05D,Y02T

Abstract:
1. A cooling system for a turbine bucket comprising: an airfoil, a base and a platform interfaced between the airfoil and base; said airfoil having a plurality of passages extending generally radially therealong for communication with a supply of cooling medium at radial inner ends thereof and convectively cooling the airfoil as the cooling medium flows generally radially outwardly along the passages toward a tip of the airfoil; a predetermined number of said passages having exit openings adjacent said airfoil tip for flowing spent cooling medium into a hot gas path of the turbine; at least one remaining passage of said plurality of passages being in communication adjacent the tip of the airfoil with a cooling passageway extending generally inwardly along a trailing edge region of the airfoil for convectively cooling the trailing edge region, said passageway terminating in an exit hole along one side and intermediate the length of the airfoil for film cooling the trailing edge along said one airfoil side.