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A gas turbine engine outlet guide vane assembly has annular inner and outer end walls, a flowpath between the inner and outer end walls, outlet guide vanes radially disposed between the inner and outer end walls, and boundary layer energizing means for energizing boundary layers using secondary flow

A gas turbine engine outlet guide vane assembly has annular inner and outer end walls, a flowpath between the inner and outer end walls, outlet guide vanes radially disposed between the inner and outer end walls, and boundary layer energizing means for energizing boundary layers using secondary flow to mix free stream flow into the boundary layers along the inner and outer end walls and suction and pressure sides of the vanes. The boundary layer energizing means includes having the vanes circumferentially leaned in a direction that the suction sides face. The boundary layer energizing means also includes swept leading and/or trailing edges of the vanes that extend radially between the inner and outer end walls. The swept leading and/or trailing edges may be curved inwardly into the vanes from the outer end walls to leading and/or trailing edge points respectively between the end walls. The boundary layer energizing means also includes vanes that are bowed circumferentially outwardly in a circumferential direction and more particularly vanes that are bowed circumferentially outwardly in a circumferential direction the pressure sides face.

대표청구항 ▼

A gas turbine engine outlet guide vane assembly has annular inner and outer end walls, a flowpath between the inner and outer end walls, outlet guide vanes radially disposed between the inner and outer end walls, and boundary layer energizing means for energizing boundary layers using secondary flow

A gas turbine engine outlet guide vane assembly has annular inner and outer end walls, a flowpath between the inner and outer end walls, outlet guide vanes radially disposed between the inner and outer end walls, and boundary layer energizing means for energizing boundary layers using secondary flow to mix free stream flow into the boundary layers along the inner and outer end walls and suction and pressure sides of the vanes. The boundary layer energizing means includes having the vanes circumferentially leaned in a direction that the suction sides face. The boundary layer energizing means also includes swept leading and/or trailing edges of the vanes that extend radially between the inner and outer end walls. The swept leading and/or trailing edges may be curved inwardly into the vanes from the outer end walls to leading and/or trailing edge points respectively between the end walls. The boundary layer energizing means also includes vanes that are bowed circumferentially outwardly in a circumferential direction and more particularly vanes that are bowed circumferentially outwardly in a circumferential direction the pressure sides face. tion is conically enlarged. 3. The method according to claim 1, wherein between the conical enlargement of the one end and the radially inwardly shaped other end there remains a cylindrical section. 4. The method according to claim 1, wherein the section following on the inside of the bearing surface is bent downwardly and the bent section is rolled in upwardly. 5. The method according to claim 4, wherein the rolling in is done in a manner in which the uppermost surface of the rolling extends in a plane of the bearing surface. eptacle and raise it into engagement with a cargo container or to project through a carrier to engage an IBC engaged with a container and lower it into said carrier when it has been disengaged from a cargo container, and a jacking means for lifting IBCs being transported in said carriers into engagement with said receptacles or lowering IBCs from engagement therewith into said carriers, said jacking post being disposed within a guide sleeve which keeps said post vertically oriented during the raising and lowering cycles of said jacking means. 9. The inter-box connector (IBC) installation and removal system of claim 8 wherein said placement positions are mounted on a buffer crane. 10. A method for inter-box connector (IBC) installation and removal comprising supporting a cargo container on at least one placement position located at a work height above the port operator worker support surface, providing a conveyer belt having a multiplicity of IBC carriers supported thereon which have openings at the bottom thereof to permit the reciprocation of a jacking element to penetrate therethrough to engage IBCs located therein and to raise them into engagement with IBC receptacles formed in a container resting on said placement position and to lower IBCs disengaged from a container thereon into said carriers, said conveyer belt formed for transporting disengaged IBCs between said container and a supply depot, and providing a jacking means for lifting and lowering IBCs from and to said carriers.