US 11,959,397 B2
Airfoil with cooling passage network having arced leading edge
Allan N. Arisi, Manchester, CT (US); and Tracy A. Propheter-Hinckley, Rocky Hill, CT (US)
Assigned to RTX CORPORATION, Farmington, CT (US)
Filed by RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed on Jul. 5, 2022, as Appl. No. 17/857,337.
Application 17/857,337 is a continuation of application No. 16/594,328, filed on Oct. 7, 2019, granted, now 11,377,964.
Claims priority of provisional application 62/757,980, filed on Nov. 9, 2018.
Prior Publication US 2022/0349311 A1, Nov. 3, 2022
Int. Cl. F01D 5/18 (2006.01)
CPC F01D 5/187 (2013.01) 20 Claims
OG exemplary drawing
 
1. An airfoil comprising:
an airfoil section having an airfoil wall defining an arced leading end, a trailing end, and first and second sides joining the arced leading end and the trailing end, the first and second sides spanning in a longitudinal direction between first and second ends, the airfoil wall circumscribing an internal core cavity;
an arced rib dividing the internal core cavity into a forward cavity and an aft cavity and fluidly isolating the forward cavity from the aft cavity; and
a cooling passage network embedded in the airfoil wall between inner and outer portions of the airfoil wall, the cooling passage network having a trailing edge and an arced leading edge, the arched leading end, the arced rib, the arced leading edge of the cooling passage network being arced such that profiles of the arched leading end, the arced rib, and the arced leading edge when taken in a radial cross-section are arced, the cooling passage network including longitudinally-elongated passages, at least one of the longitudinally-elongated passages is a diverging-converging passage, the diverging-converging passage including a divergent section that spans from the first end of the airfoil wall to an intermediate span location of the airfoil section, and a convergent section that spans from the intermediate span location to the second end of the airfoil wall.