Aircraft engine air flow straightening vane and associated flow straightening structure
A flow straightening vane made of composite materials includes a core made up of three-dimensional woven textile rods which core is surrounded by a textile covering, this core and this covering being consolidated using a thermoset resin.
1. A flow straightening vane made of composite materials comprising a core made up of textile rods woven in three dimensions and an area defined between the textile rods, the area being hollow or filled with a lightened material, the textile rods being surrounded by a textile covering connected to the textile rods and defining an aerodynamic profile of the flow straightening vane, said core and said textile covering being consolidated using a thermoset resin, wherein the textile rods are oriented along a vertical direction of an aircraft engine and are configured to transfer structural loads between inner and outer wheels of the aircraft engine, the textile rods having longitudinal ends extending beyond the textile covering to form termination ends for connecting to the inner and outer wheels of the aircraft engine, the termination ends being integral parts of the textile rods.
2. The flow straightening vane according to claim 1 , wherein said termination ends have a shape selected from a group consisting of T-shapes, L-shapes and dovetail-shapes, parallel to a vane plane, transverse to the vane plane, inclined relative to the vane plane, folded or twisted.
3. The flow straightening vane according to claim 1 , wherein said core and said textile covering are formed of fibers selected from a group consisting of carbon fibers, glass fibers and aramid fibers.
4. The flow straightening vane according to claim 1 , wherein said thermoset resin is a resin compatible with an injection method, said resin selected from a group consisting of epoxy resins and the polyimide resins.
5. The flow straightening vane according to claim 1 , wherein said textile is selected from a group consisting of two-dimensional, woven or stitched textiles, and three-dimensional textiles.
6. The flow straightening vane according to claim 1 , wherein said core and said textile covering are interconnected by transverse fibers or transverse threads.
7. The flow straightening vane according to claim 1 , wherein said core has a selected shape from a group consisting of parallel bars-shapes, H-shapes, H-shapes with several bars, O-shapes, W-shapes, M-shapes, X-shapes with parallel bars, X-shapes, K-shapes, inverted K-shapes, N-shapes, and inverted N-shapes.
8. The flow straightening vane according to claim 1 , wherein said thermoset resin is a thermoplastic resin compatible with an injection method, said thermoplastic resin selected from a group consisting of polyetheretherketone and polyphenylene sulfide.
9. The flow straightening vane according to claim 1 , wherein said lightened material is a material made of a rigid closed-cell foam or a low density foam.
10. The flow straightening vane according to claim 1 , wherein said textile rods each comprises two rectangular sections being pivoted 90 degrees relative to each other.
11. The flow straightening vane according to claim 10 , wherein said textile rods each comprises a square intermediate area distributing chain fibers to allow pivoting from one of said two rectangular sections to the other rectangular section.
12. A flow straightening structure according to claim 1 , wherein the termination ends are connected to first and second wheels of a flow straightening set.
13. The flow straightening structure according to claim 12 , wherein a diameter of said first wheel is smaller than a diameter of said second wheel.