De-icing device for turbojet inlet guide wheel vane, vane provided with such a de-icing device, and aircraft engine equipped with such vanes
View Patent ↗The de-icing device is intended for the vane ( 10 ) of the inlet guide wheel ( 4 ) of a turbojet ( 2 ), comprising a fixed part ( 12 ) arranged on the upstream side and a mobile flap ( 18 ) arranged on the downstream side, in which said fixed part ( 12 ) comprises a trailing edge ( 16 ) substantially in the shape of a “U”, with one of the branches ( 162 ) being located on the intrados side (I) and the other branch ( 164 ) being located on the extrados side (E). It comprises at least one emission window ( 202 ), oriented substantially along an upstream-downstream direction, and arranged along the branch ( 162 ) of the “U” located on the intrados side (I) of the trailing edge ( 16 ). The inlet guide wheel ( 4 ) vane ( 10 ) is equipped with at least such a de-icing device. The aircraft engine ( 2 ) comprises at least one vane ( 10 ) equipped with such a de-icing device.
1. A de-icing device for a vane ( 10 ) of an inlet guide wheel ( 4 ) of a turbojet ( 2 ),
said vane ( 10 ) comprising a fixed part ( 12 ) arranged on the upstream side and an associated mobile flap ( 18 ) arranged on the downstream side, and
said fixed part ( 12 ) comprising a hollow body ( 13 ) and a trailing edge ( 16 ), for which the profile is substantially in the shape of a “U”, with the branches ( 162 , 164 ) extending substantially in the downstream direction, one of the branches ( 162 ) being located on the intrados side (I) and the other branch ( 164 ) being located on the extrados side (E),
characterized in that it comprises at least one emission window ( 202 ), oriented substantially along an upstream-downstream direction, and arranged only along the branch ( 162 ) of the “U” located on the intrados side (I) of the trailing edge ( 16 ) of the fixed part ( 12 ), said emission window ( 202 ) being obtained by putting a ribbed plate ( 152 ) into contact with said branch ( 162 ) of the “U”.
2. A de-icing device according to claim 1 , characterized in that at least one of the emission windows ( 202 ) has a constant and prismatic cross-section.
3. A de-icing device according to claim 1 , characterized in that at least one of the emission windows ( 202 ) has a constant cross-section inclined upwards.
4. A de-icing device according to claim 1 , characterized in that at least one of the emission windows ( 202 ) has a constant cross-section inclined downwards.
5. A de-icing device according to claim 1 , characterized in that at least one of the emission windows ( 202 ) has a variable cross-section.
6. A de-icing device according to claim 5 , characterized in that said variable cross-section is in the shape of a fish tail.
7. A de-icing device according to claim 1 , characterized in that when a branch ( 162 ) of the “U” forming the trailing edge ( 16 ) of the fixed part ( 12 ) comprises at least two emission windows ( 202 ), said emission windows ( 202 ) are uniformly distributed along said branch ( 162 ).
8. A de-icing device according to claim 1 , characterized in that said ribbed plate ( 152 ) is obtained by cutting and stamping operations from a flat plate.
9. A de-icing device according to claim 1 , said mobile flap ( 18 ) being capable of pivoting about a substantially radial direction ( 22 ) starting from a central hub ( 8 ) through a central pivot ( 24 ) and a peripheral pivot ( 26 ), characterized in that it also comprises through perforations ( 206 ), substantially along an upstream-downstream direction, the bottom ( 15 ) of the “U” forming the trailing edge ( 16 ) of the fixed part ( 12 ), said perforations ( 206 ) being located at least in a zone ( 156 , 158 ) located substantially facing one of said pivots ( 24 , 26 ), during operation.
10. A de-icing device according to claim 1 , characterized in that it also comprises means ( 300 , 400 ) of conveying hot air to a casing ( 6 ) of the inlet guide wheel ( 4 ) from a compression stage ( 920 ) on the downstream side of said inlet guide wheel ( 4 ).
11. A de-icing device according to claim 10 , characterized in that said hot air conveyance means ( 300 , 400 ) comprise a collector ( 300 ), arranged circumferentially around said casing ( 6 ).
12. A de-icing device according to claim 11 , characterized in that said hot air conveyance means ( 300 , 400 ) also comprise at least one conveyance duct ( 400 ) that connects said compression stage ( 920 ) to said collector ( 300 ).
13. A vane ( 10 ) of an inlet guide wheel ( 4 ) of a turbojet ( 2 ), of the type comprising a fixed part ( 12 ) and a mobile flap ( 18 ) capable of pivoting about a substantially radial direction ( 22 ) starting from a central hub ( 8 ), characterized in that it is provided with a de-icing device according to claim 1 .
14. An aircraft engine ( 2 ), characterized in that it comprises an inlet guide wheel ( 4 ) equipped with vanes ( 10 ) according to claim 13 .
15. An aircraft engine ( 2 ), characterized in that it comprises at least one de-icing device according to claim 1 .
16. A de-icing device for a vane ( 10 ) of an inlet guide wheel ( 4 ) of a turbojet ( 2 ),
said vane ( 10 ) comprising a fixed part ( 12 ) arranged on the upstream side and an associated mobile flap ( 18 ) arranged on the downstream side, and
said fixed part ( 12 ) comprising a hollow body ( 13 ) and a trailing edge ( 16 ), for which the profile is substantially in the shape of a “U”, with the branches ( 162 , 164 ) extending substantially in the downstream direction, one of the branches ( 162 ) being located on the intrados side (I) and the other branch ( 164 ) being located on the extrados side (E),
characterized in that it comprises at least one emission window ( 202 ), oriented substantially along an upstream-downstream direction, and arranged along the branch ( 162 ) of the “U” located on the intrados side (I) of the trailing edge ( 16 ) of the fixed part ( 12 ), said emission window ( 202 ) being obtained by putting a ribbed plate ( 152 ) into contact with said branch ( 162 ) of the “U”,
and in that it also comprises at least one emission window ( 204 ) oriented substantially along an upstream-downstream direction, and arranged along the branch ( 164 ) of the “U” located on the extrados side (E) of the trailing edge ( 16 ) of the fixed part ( 12 ), said emission window ( 204 ) being obtained by putting a ribbed plate ( 154 ) into contact with said branch ( 164 ) of the “U”.
17. A de-icing device according to claim 16 , characterized in that at least one of the emission windows ( 202 , 204 ) has a constant and prismatic cross-section.
18. A de-icing device according to claim 16 , characterized in that at least one of the emission windows ( 202 , 204 ) has a constant cross-section inclined upwards.
19. A de-icing device according to claim 16 , characterized in that at least one of the emission windows ( 202 , 204 ) has a constant cross-section inclined downwards.
20. A de-icing device according to claim 16 , characterized in that at least one of the emission windows ( 202 , 204 ) has a variable cross-section.
21. A de-icing device according to claim 20 , characterized in that said variable cross-section is in the shape of a fish tail.
22. A de-icing device according to claim 16 , characterized in that when a branch ( 162 , 164 ) of the “U” forming the trailing edge ( 16 ) of the fixed part ( 12 ) comprises at least two emission windows ( 202 , 204 ), said emission windows ( 202 , 204 ) are uniformly distributed along said branch ( 162 , 164 ).
23. A de-icing device according to claim 16 , characterized in that said ribbed plate ( 152 , 153 ) is obtained by cutting and stamping operations from a flat plate.
24. A de-icing device according to claim 16 , said mobile flap ( 18 ) being capable of pivoting about a substantially radial direction ( 22 ) starting from a central hub ( 8 ) through a central pivot ( 24 ) and a peripheral pivot ( 26 ), characterized in that it also comprises through perforations ( 206 ), substantially along an upstream-downstream direction, the bottom ( 15 ) of the “U” forming the trailing edge ( 16 ) of the fixed part ( 12 ), said perforations ( 206 ) being located at least in a zone ( 156 , 158 ) located substantially facing one of said pivots ( 24 , 26 ), during operation.
25. A de-icing device according to claim 16 , characterized in that it also comprises means ( 300 , 400 ) of conveying hot air to a casing ( 6 ) of the inlet guide wheel ( 4 ) from a compression stage ( 920 ) on the downstream side of said inlet guide wheel ( 4 ).
26. A de-icing device according to claim 25 , characterized in that said hot air conveyance means ( 300 , 400 ) comprise a collector ( 300 ), arranged circumferentially around said casing ( 6 ).
27. A de-icing device according to claim 26 , characterized in that said hot air conveyance means ( 300 , 400 ) also comprise at least one conveyance duct ( 400 ) that connects said compression stage ( 920 ) to said collector ( 300 ).
28. A De-icing device according to claim 16 , characterized in that the emission window(s) ( 202 ) located on the intrados side (I) and the emission window(s) ( 204 ) located on the extrados side (E) are arranged facing each other.
29. A de-icing device according to claim 16 , characterized in that the emission window(s) ( 202 ) located on the intrados side (I) and the emission window(s) ( 204 ) located on the extrados side (E) are staggered from each other.
30. A vane ( 10 ) of an inlet guide wheel ( 4 ) of a turbojet ( 2 ), of the type comprising a fixed part ( 12 ) and a mobile flap ( 18 ) capable of pivoting about a substantially radial direction ( 22 ) starting from a central hub ( 8 ), characterized in that it is provided with a de-icing device according to claim 16 .
31. An aircraft engine ( 2 ), characterized in that it comprises an inlet guide wheel ( 4 ) equipped with vanes ( 10 ) according to claim 30 .
32. An aircraft engine ( 2 ), characterized in that it comprises at least one de-icing device according to claim 16 .