Patent ID: 9441488
Filing Date: 2016-09-13
CPC Classification: F01D,F05D,Y02T

Claim Text:
1. A gas turbine airfoil having a wall, the wall having an inside surface and an outside surface, comprising: (a) a plurality of side by side shaped cooling holes, arranged in a lateral row, formed through the wall and extending from the inside surface to the outside surface, the cooling holes being angled through the wall of the airfoil; (b) a trench machined into the outside surface of the wall and connecting the plurality of shaped cooling holes, the trench having a floor, an upstream surface and a downstream surface; (c) a plurality of ramped diffusion regions, wherein each ramped diffusion region extends from one of the plurality of cooling holes and up to the outside surface of the airfoil, the ramped diffusion regions being in the same plane as a bottom surface of the corresponding cooling hole as an uninterrupted extension of the shaped hole, and the plurality of ramped diffusion regions extending along the lateral direction.