Patent ID: 11859511
Assignee: ROLLS-ROYCE CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 10:
11. A dual-wall airfoil comprising:
a spar, wherein the spar includes a plurality of internal cavities, the internal cavities including
a first cavity disposed at a leading edge of the airfoil,
a second cavity disposed at a trailing edge of the airfoil,
a third cavity disposed between the first cavity and the second cavity;

a coversheet on the spar; and
a dual feed circuit disposed between the spar and the coversheet, the dual feed circuit including
a first dam,
a second dam,
a first inlet disposed adjacent to and downstream of the first dam,
a second inlet disposed adjacent to and upstream of the second dam, and
a circuit outlet disposed between the first inlet and the second inlet,

wherein the first inlet connects the first cavity to the dual feed circuit and the second inlet connects the third cavity to the dual feed circuit or wherein the first inlet connects the third cavity to the dual feed circuit and the second inlet connects the second cavity to the dual feed circuit.