US 11,753,944 B2
Airfoil with wall that tapers in thickness
Allan N. Arisi, Manchester, CT (US); and Tracy A. Propheter-Hinckley, Rocky Hill, CT (US)
Assigned to RAYTHEON TECHNOLOGIES CORPORATION, Farmington, CT (US)
Filed by United Technologies Corporation, Farmington, CT (US)
Filed on Oct. 7, 2019, as Appl. No. 16/594,353.
Claims priority of provisional application 62/757,989, filed on Nov. 9, 2018.
Prior Publication US 2020/0332662 A1, Oct. 22, 2020
Int. Cl. F01D 5/18 (2006.01); F01D 25/12 (2006.01); F02C 7/18 (2006.01)
CPC F01D 5/186 (2013.01) [F01D 5/187 (2013.01); F01D 25/12 (2013.01); F02C 7/18 (2013.01); F05D 2220/32 (2013.01); F05D 2260/201 (2013.01); F05D 2260/204 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An airfoil comprising:
an airfoil section having an airfoil wall defining a leading end, a trailing end, and first and second sides joining the 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;
a skincore passage embedded in the first side of the airfoil wall between inner and outer portions of the first side of airfoil wall, the skincore passage defining a passage forward edge and a passage aft edge, the first side of the airfoil wall having a portion that tapers in thickness at the passage aft edge;
a cooling passage network embedded in the second side of the airfoil wall between inner and outer portions of the second side of airfoil wall, the inner portion of the second side of the airfoil wall including a protrusion at the location of the cooling passage network and across the internal core cavity from the portion of the first side that tapers in thickness, the protrusion having an apex, a forward side, and an aft side, and the aft side is longer than the forward side, the cooling passage network including an inlet through the inner portion of the second side of the airfoil wall, an outlet through the outer portion of the second side of the airfoil wall, an array of flow guides between the inlet and the outlet define sub-passages there between, a radially-elongated manifold region into which the inlet opens, and the sub-passages lead from the radially-elongated manifold region.