A system for directing the flow of a fluid and controlling the rate of flow of the fluid. The system comprises a channel for directing the flow of the fluid; at least a pair of articulating vanes positioned within the channel for controlling the flow rate of the fluid within the channel; and a linka
A system for directing the flow of a fluid and controlling the rate of flow of the fluid. The system comprises a channel for directing the flow of the fluid; at least a pair of articulating vanes positioned within the channel for controlling the flow rate of the fluid within the channel; and a linkage between the vanes coupling the articulation of each of the vanes to the other of the vanes, wherein each vane imparts a force on the linkage when the relative angle of attack is greater than zero, wherein the force imparted on the linkage by one of the vanes is at least partially cancelled by the force imparted on the linkage by the other of the vanes during the articulation of the vanes.
대표청구항▼
1. A system for directing the flow of a fluid and controlling the rate of flow of the fluid, said system comprising: a channel for directing the flow of the fluid;at least a pair of articulating vanes positioned within said channel for controlling the flow rate of the fluid within said channel, each
1. A system for directing the flow of a fluid and controlling the rate of flow of the fluid, said system comprising: a channel for directing the flow of the fluid;at least a pair of articulating vanes positioned within said channel for controlling the flow rate of the fluid within said channel, each of said vanes comprising a pair of lateral major surfaces forming a leading edge and a trailing edge of said vane, and an axis of articulation intersecting said vane at a point spaced from the aerodynamic center of said vane; anda linkage between said vanes coupling the articulation of each of said vanes to the other of said vanes, wherein each vane imparts a force on said linkage when the relative angle of attack is greater than zero, wherein the force imparted on said linkage by one of said vanes is at least partially cancelled by the force imparted on the linkage by the other of said vanes during the articulation of said vanes, wherein the axis of articulation of one of said vanes intersects said vane between the aerodynamic center and said leading edge of said vane, and the axis of articulation of the other of said vanes intersects said other vane between the aerodynamic center and said trailing edge of said other vane. 2. The system of claim 1, further comprising: an actuator member, wherein said actuator member articulates said linkage to articulate one of said vanes about the axis of articulation in a first direction and the other of said vanes about the axis of articulation in a second direction which is different from the first direction. 3. The system of claim 2, wherein said actuator member articulates said linkage such that said leading edge of one of said vanes operably engages said leading edge of the other of said vanes. 4. The system of claim 1, wherein each of said vanes further comprises a stem and gear set disposed on said stem and wherein said linkage comprises a rack with a plurality of gear teeth for operably engaging each gear set to couple the articulation of said vanes. 5. The system of claim 1, wherein each of said vanes further comprises a stem, and said linkage comprises a plurality of lever arms for operably engaging said stems to couple the articulation of said vanes. 6. The system of claim 1, wherein each of said vanes further comprises a cam and a restoring spring, wherein said linkage couples the articulation of each vane via said cam. 7. The system of claim 1, wherein said linkage is an elongated member positioned transverse to the direction of flow of the fluid. 8. The system of claim 7, wherein said linkage is operably coupled to each of said vanes at a leading edge of said linkage. 9. The system of claim 7, wherein said linkage is operably coupled to one of said vanes at a leading edge of said linkage and the other of said vanes at a trailing edge of said linkage. 10. The system of claim 9, wherein the axes of articulation of said vanes are laterally aligned. 11. The system of claim 1, wherein the force imparted on said linkage by one of said vanes is cancelled by the force imparted on the linkage by the other of said vanes during articulation of said vanes. 12. The system of claim 1, further comprising: an array of articulating vanes that comprises said at least a pair of articulating vanes, said linkage coupling the articulation of each of said vanes of said array, wherein the force imparted on said linkage by each vane of said array is at least partially cancelled by the force imparted on said linkage by at least one other vane of said array during the articulation of said vanes. 13. The system of claim 12, further comprising: an actuator member, wherein said actuator member articulates said linkage to articulate each vane of said array about the axis of articulation such that either a leading or trailing edge of each of said vanes of said array operably engages a leading or trailing edge of at least one other of said vanes of said array, and the force imparted on said linkage by each of said vanes of said array is cancelled by the force imparted on said linkage by at least one other of said vanes of said array during the articulation of said vanes. 14. The system of claim 12, wherein a lateral spacing between the axes of articulation of any pair of said vanes of said array does not equal a second lateral spacing between the axes of articulation of at least one other pair of said vanes of said array. 15. The system of claim 1, wherein each of said vanes further comprises a flap being operably coupled to said trailing edge of said vane to articulate about a flap axis parallel to said axis of articulation. 16. The system of claim 15, wherein the chord of said flap is parallel with the chord of said vane during articulation of said vanes. 17. A system for directing the flow of a fluid in a turbofan jet engine and controlling the rate of flow of the fluid, said system comprising: a duct for directing the flow of the fluid along a centerline axis of said engine;an array of articulating vanes positioned circumferentially around the centerline axis within said duct for directing and controlling the flow of the fluid within said duct, each of said vanes comprising a pair of lateral major surfaces forming a leading edge and trailing edge of said vane, a stem protruding through said duct, and an axis of articulation intersecting said vane at a point spaced from the aerodynamic center of said vane; anda circumferential actuation ring positioned outside said duct, said actuation ring being operably coupled to the stem of each of said vanes to couple the articulation of each vane about its axis of articulation, wherein each vane imparts a force on said actuation ring when the relative angle of attack is greater than zero,wherein the force imparted on said actuation ring by one of said vanes is at least partially cancelled by the force imparted on the actuation ring by at least one other of said vanes during articulation of said vanes, wherein the axis of articulation of one of said vanes intersects said vane between the aerodynamic center and said leading edge of said vane, and the axis of articulation of another of said vanes intersects said another vane between the aerodynamic center and said trailing edge of said another vane. 18. The system of claim 17, wherein said duct comprises an inlet duct and said vanes are positioned in a radially outer portion of said inlet duct. 19. The system of claim 17, further comprising: an actuator member, wherein said actuator member articulates said actuation ring to articulate said array of vanes such that either a leading or trailing edge of one of said vanes operably engages a leading or trailing edge of at least one other of said vanes, and the force imparted on said actuation ring by each of said vanes is cancelled by the force imparted on said actuation ring by at least one other of said vanes during the articulation of said vanes.
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