Segmented variable fan outlet guide vane with cam assembly and unique actuation mechanisms

A fan assembly for a gas turbine engine the fan assembly comprising

• a fan duct arranged circumferentially around a central axis, a fan adapted to rotate about the central axis to force fan exit air toward an aft end of the fan duct, and
• an outlet guide vane assembly located in the fan duct axially downstream of the fan and configured to adjust a direction of incoming fan exit air received from the plurality of fan blades and reduce incidence between the outlet guide vane assembly and the fan exit air, the outlet guide vane assembly including
• a first variable leading edge outlet guide vane that extends radially relative to the central axis and includes a leading edge portion and a fixed aft portion, the leading edge portion including a first tip segment configured to rotate about a leading edge pitch axis and a first hub segment located radially inward of and separate from the first tip segment, the first hub segment configured to independently rotate about the leading edge pitch axis relative to the first tip segment,
• a first actuation assembly including a first cam, wherein rotation of the first cam is configured to cause rotation of the first tip segment about the leading edge pitch axis to a first pitch angle relative to the incoming fan exit air, and
• a second actuation assembly including a second cam configured to be selectively rotated independent of the first cam, wherein rotation of the second cam is configured to cause rotation of the first hub segment about the leading edge pitch axis to a second pitch angle relative to the incoming fan exit air.

A method comprising

• arranging a fan duct circumferentially around a central axis,
• providing a fan comprising a plurality of fan blades that extend radially outward relative to the central axis and that are adapted to rotate about the central axis to force fan exit air toward an aft end of the fan duct,
• arranging an outlet guide vane assembly in the fan duct axially downstream of the fan and configured to adjust a direction of incoming fan exit air received from the plurality of fan blades and reduce incidence between the outlet guide vane assembly and the fan exit air, the outlet guide vane assembly including a first variable leading edge guide vane that extends radially relative to the central axis and includes a leading edge portion and a fixed aft portion, the leading edge portion including a first tip segment configured to rotate about a leading edge pitch axis and a first hub segment located radially inward of and separate from the first tip segment, the first hub segment configured to independently rotate about the leading edge pitch axis relative to the first tip segment, arranging a first actuation assembly relative to the first tip segment, the first actuation assembly including a first cam rod and a first cam fixedly coupled to the first cam rod, wherein the first cam rod is configured to be selectively rotated so as to selectively rotate the first cam, wherein rotation of the first cam causes rotation of the first tip segment about the leading edge pitch axis to a first pitch angle relative to the incoming fan exit air, and
• arranging a second actuation assembly relative to the first hub segment, the second actuation assembly including a second cam rod and a second cam fixedly coupled to the second cam rod, wherein the second cam rod is configured to be selectively rotated independent of the first cam rod so as to selectively rotate the second cam, wherein rotation of the second cam causes rotation of the first hub segment about the leading edge pitch axis to a second pitch angle relative to the incoming fan exit air.