A device for mixing fuel and air of a jet engine includes at least one air-carrying duct and at least one further fuel-carrying duct. Guide elements extending over the duct height and distributed over the circumference of the duct are provided at least in the air-carrying duct, in the area of which
A device for mixing fuel and air of a jet engine includes at least one air-carrying duct and at least one further fuel-carrying duct. Guide elements extending over the duct height and distributed over the circumference of the duct are provided at least in the air-carrying duct, in the area of which guide elements a twist can be imparted to the air flowing in the air-carrying duct in order to improve mixing between the air and the fuel downstream of the ducts. The guide elements are provided at a trailing edge with at least one downstream extending projection and/or upstream extending recess designed at least approximately or at least in some areas with a sharp edge.
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1. A fuel injector for mixing fuel and air of a jet engine, comprising: at least one air-carrying duct of the fuel injector;at least one further fuel-carrying duct for supplying fuel into a combustion chamber;guide elements provided at least in the air-carrying duct and extending over an entire heig
1. A fuel injector for mixing fuel and air of a jet engine, comprising: at least one air-carrying duct of the fuel injector;at least one further fuel-carrying duct for supplying fuel into a combustion chamber;guide elements provided at least in the air-carrying duct and extending over an entire height from a radially inner wall to a radially outer wall of the air-carrying duct and distributed over a circumference of the air-carrying duct for imparting a twist to air flowing in the air-carrying duct; each guide element having a trailing edge area with at least one of a downstream extending projection or an upstream projecting recess, the at least one of the projection or the recess having a portion configured at least approximately as a sharp edge, the trailing edge area improving mixing between the air and fuel downstream of the ducts, the at least one of the projection or the recess creating at least one open passage from a first surface of the guide element to an opposite second surface of the guide element upstream of a downstream-most edge of the guide element. 2. The device of claim 1, wherein the at least one projection or recess is triangular at least in some areas. 3. The device of claim 2, wherein the at least one projection or recess is trapezoidal at least in some areas. 4. The device of claim 3, wherein each guide element includes a plurality of projections and recesses, and a shape and spacing of the projections and recesses at least partly vary from one another. 5. The device of claim 3, wherein each guide element includes a plurality of projections and recesses, and a shape and spacing of the projections and recesses, respectively are identical to one another. 6. The device of claim 5, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 7. The device of claim 6, comprising at least two concentrically arranged annular air-carrying ducts surrounding the fuel-carrying duct. 8. The device of claim 1, wherein the at least one projection or recess is trapezoidal at least in some areas. 9. The device of claim 8, wherein each guide element includes a plurality of projections and recesses, and a shape and spacing of the projections and recesses at least partly vary from one another. 10. The device of claim 8, wherein each guide element includes a plurality of projections and recesses, and a shape and spacing of the projections and recesses, respectively are identical to one another. 11. The device of claim 10, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 12. The device of claim 9, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 13. The device of claim 1, comprising at least two concentrically arranged annular air-carrying ducts surrounding the fuel-carrying duct. 14. The device of claim 2, wherein each guide element includes a plurality of projections and recesses, and a shape and spacing of the projections and recesses at least partly vary from one another. 15. The device of claim 2, wherein each guide element includes a plurality of projections and recesses, and a shape and spacing of the projections and recesses, respectively are identical to one another. 16. The device of claim 15, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 17. The device of claim 14, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 18. The device of claim 1, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 19. The device of claim 4, wherein the air-carrying duct is an annular duct and surrounds the fuel-carrying duct. 20. A fuel injector for mixing fuel and air of a jet engine, comprising: at least one air-carrying duct of the fuel injector;at least one further fuel-carrying duct for supplying fuel into a combustion chamber;guide elements provided at least in the air-carrying duct and extending over an entire height from a radially inner wall to a radially outer wall of the air-carrying duct and distributed over a circumference of the air-carrying duct for imparting a twist to air flowing in the air-carrying duct; each guide element having a serrated trailing edge with sharp edged serrations, the serrated trailing edge improving mixing between the air and fuel downstream of the ducts.
Markowski Stanley J. (East Hartford CT) Reilly Richard S. (East Hartford CT), Turbofan engine with augmented combustion chamber using vorbix principle.
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