Patent ID: 11965425
Assignee: GENERAL ELECTRIC COMPANY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  B  G | IPC B  F  G

Claim 8:
9. A turbofan engine comprising:
a fan section that comprises a fan having a plurality of fan blades;
a turbomachine disposed downstream from the fan section, the turbomachine comprising a compressor section, a combustion section, and a turbine section in serial flow arrangement; and
a plurality of circumferentially-spaced outlet guide vanes that are positioned downstream of the fan, wherein each of the outlet guide vanes define a spanwise direction, a chordwise direction, a root end, a tip end, a leading edge end, and a trailing edge end, each of the outlet guide vanes comprising:
a leading edge extending from the leading edge end;
a body extending along the spanwise direction between the root end and the tip end, the body comprising a plurality of cavity walls defining a plurality of cavities, each of the plurality of cavities having an inlet located at the leading edge, wherein each cavity of the plurality of cavities is a closed cavity, and wherein the plurality of cavities are empty; and
a porous face sheet positioned on at least one inlet of the plurality of cavities.