Patent ID: 11905849
Assignee: RTX CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 11:
12. A core assembly for manufacturing an airfoil having a leading edge, a trailing edge, a pressure side wall extending between the leading edge and the trailing edge and defining a pressure side, and a suction side wall extending between the leading edge and the trailing edge and defining a suction side, wherein a plurality of cooling passages are formed within the airfoil, the core assembly comprising:
a leading edge cavity core configured to define a leading edge cavity within a formed airfoil body that is defined along a leading edge to provide cooling to the leading edge of the formed airfoil;
a trailing edge cavity core configured to define a trailing edge cavity within the formed airfoil body that is defined along a trailing edge to provide cooling to the trailing edge of the formed airfoil;
a plurality of pressure side cavity cores configured to define a plurality of formed pressure side skin cavities arranged along an interior surface of a pressure side wall of the formed airfoil body, wherein at least one formed pressure side skin cavity wall does not extend to a suction side wall of the formed airfoil body;
a plurality of suction side cavity cores configured to define a plurality of formed suction side skin cavities arranged along an interior surface of a suction side wall of the formed airfoil body, wherein at least one formed suction side skin cavity wall does not extend to a pressure side wall of the formed airfoil body; and
a main body cavity core positioned axially between the leading edge cavity core and the trailing edge cavity core and circumferentially between the plurality of pressure side cavity cores and the plurality of suction side cavity cores,
wherein the plurality of pressure side cavity cores and the plurality of suction side cavity cores are arranged in a staggered pattern in a direction from the leading edge cavity core to the trailing edge cavity core along the main body cavity core,
wherein the main body cavity core has a tapering thickness in a circumferential direction from a leading edge end of the main body cavity core toward a trailing edge end of the main body cavity core, wherein the tapering thickness decreases smoothly and the trailing edge end has a thickness that is at least 40% a thickness of the leading edge end.