Patent ID: 8439647
Filing Date: 2013-05-14
Classification: B21D,B23K,B23P,F01D,F05D,Y10T

Abstract:
1. A turbine airfoil comprising: a leading edge and a trailing edge extending in a span-wise direction; a plurality of U-channels, each U-channel comprising a closed side formed by a cross wall, an open side opposite the cross wall, and two side walls extending from the cross wall to the open side; the U-channels attached to each other in a parallel, closed-side to open-side sequence, forming a series of cooling channels oriented span-wise; a first of the U-channels comprising a curved cross wall forming the leading edge; wherein a last of the U-channels comprises side walls that converge and bond to each other distally, forming the trailing edge comprising ramps on distal inner portions of the side walls of the last of the U-channels, said ramps configured to form the trailing edge thinner than a combined thickness of the side walls of the last of the U-channels.