Patent ID: 6287075
Filing Date: 2001-09-11
Classification: F01D

Abstract:
A turbine airfoil comprising:a leading edge and a trailing edge spaced axially apart;a root and a tip spaced apart along a span axis;a first side and a second side spaced laterally apart;a cooling circuit disposed between said first and second sides for channeling a cooling fluid therethrough to cool said airfoil;a plurality of diffusion fan holes spaced apart along said span axis in said first side, each of said fan holes increasing in flow area between an inlet at said cooling circuit and an outlet on said first side disposed coaxially about a centerline fan axis for diffusing said cooling fluid channeled therethrough to create a film of said cooling fluid along said first side from said outlet; andsaid fan axis being inclined at an acute span angle from said span axis, with said outlet being greater in span height than said inlet, and substantially equal in width with said inlet for increasing coverage of said outlets and films therefrom along said span axis.