Pre-vaporizing pipe, combustion assembly provided therewith and turbomachine provided therewith

Patent metadata

Field	Value
Publication number	US-11867401-B2
Application number	US-202017613861-A
Country	US
Kind code	B2
Filing date	May 25, 2020
Priority date	May 28, 2019
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

The invention relates to a pre-vaporizing pipe ( 5 ) for a combustion chamber of a turbomachine, comprising a generally elongate main body ( 50 ), comprising a first end portion ( 51 ) delimiting an inlet duct ( 52 ) in which a fuel injector is to be mounted, the body ( 50 ) having an external surface ( 500 ) having a first length (L 1 ) that extends from the portion ( 51 ) to at least one first fuel outlet end piece ( 53 ), and a second length (L 2 ) that extends the first length (L 1 ) from the end piece ( 53 ) and that extends from the end piece ( 53 ) to a second fuel outlet end piece ( 54 ). According to the invention, inside the body ( 50 ) there is a first channel ( 55 ) connecting the duct ( 52 ) to the end piece ( 53 ) and a second channel ( 56 ) which is distinct from the first channel ( 55 ) and which connects the duct ( 52 ) to the end piece ( 54 ).

First claim

The invention claimed is:

1. A pre-vaporization rod for a fuel combustion chamber of a turbomachine, the pre-vaporization rod comprising a main body of elongated shape, the main body comprising a first end portion delimiting an inlet duct in which a fuel injector is intended to be mounted,
the main body having an external surface having at least a first length extending from the first end portion to at least a first fuel outlet end piece, and at least a second length, which extends the first length from the first fuel outlet end piece and which extends from the first fuel outlet end piece to at least a second fuel outlet end piece,
wherein inside the main body is at least a first channel connecting the inlet duct to the first fuel outlet end piece and at least a second channel, which is separate from the first channel and which connects the inlet duct to the second fuel outlet end piece,
wherein the first channel has a first internal fuel passage length which is greater than the first length.

2. The pre-vaporization rod according to claim 1 , wherein the external surface of the body comprises a main arm extending along a first longitudinal direction and a lateral arm connected to the main arm and deviating in a curved manner along a second direction, which is lateral relative to the first longitudinal direction,
the main arm connects the first end portion to the first fuel outlet end piece, and
the second fuel outlet end piece is located in the lateral arm, at a first distance from the main arm and at a second distance from the first fuel outlet end piece.

3. The pre-vaporization rod according to claim 1 , wherein the first fuel outlet end piece and the second fuel outlet end piece are oriented in the same orientation of a same third fuel outlet direction.

4. The pre-vaporization rod according to claim 1 , wherein a first portion of the first internal fuel passage length of the first channel is located inside the second length of the external surface of the main body.

5. The pre-vaporization rod according to claim 1 , wherein the first channel comprises a second portion, which is bent relative to a third portion of the first channel, connected to the second portion of the first channel.

6. The pre-vaporization rod according to claim 5 , wherein the first channel comprises at least one bend located inside the second length of the external surface of the main body and between the third portion of the first channel and the second portion of the first channel.

7. The pre-vaporization rod according to claim 1 , wherein the first channel adjoins a portion of the second channel inside the main body on the first length and on a fourth portion of the second length.

8. The pre-vaporization rod according to claim 1 , wherein the first channel, the first fuel outlet end piece, the second channel and the second fuel outlet end piece are delimited by at least one internal wall of the main body and by the external surface of the main body, the external surface being in one single piece with the at least one internal wall.

9. The pre-vaporization rod according to claim 1 , wherein the main body is a part made by additive manufacturing.

10. The pre-vaporization rod according to claim 1 , further comprising at least one orifice for introducing air into the inlet duct.

11. The pre-vaporization rod according to claim 1 , wherein the first channel is delimited by a first internal surface of the main body, the second channel is delimited by a second internal surface of the main body,
the first internal surface of the main body has a first area which is equal, by within less than 10%, to a second area of the second internal surface of the main body.

12. A turbomachine combustion assembly comprising
a casing,
a fuel combustion chamber disposed in the casing,
at least one pre-vaporization rod according to claim 1 , whose first end portion is mounted on the casing and whose main body enters the fuel combustion chamber through an opening made in a wall of the fuel combustion chamber, the first fuel outlet end piece and the second fuel outlet end piece being located in the fuel combustion chamber, and
a fuel injector being mounted in the inlet duct of the pre-vaporization rod.

13. A turbomachine comprising a turbomachine combustion assembly according to claim 12 .

14. The pre-vaporization rod according to claim 1 , wherein the first length is in series with the second length.

15. The pre-vaporization rod according to claim 1 , wherein:
the first length is taken along a first shortest line of the external surface from the first end portion to a first central portion of the first fuel outlet end piece, and
the second length is taken along a second shortest line of the external surface from the first central portion of the first fuel outlet end piece to a second central portion of the second fuel outlet end piece.

16. A pre-vaporization rod for a fuel combustion chamber of a turbomachine, comprising a main body of elongated shape, the main body comprising a first end portion delimiting an inlet duct in which a fuel injector is intended to be mounted,
the main body having an external surface having at least a first length extending from the first end portion to at least a first fuel outlet end piece, and at least a second length, which extends the first length from the first fuel outlet end piece and which extends from the first fuel outlet end piece to at least a second fuel outlet end piece,
wherein inside the main body is at least a first channel connecting the inlet duct to the first fuel outlet end piece and at least a second channel, which is separate from the first channel and which connects the inlet duct to the second fuel outlet end piece,
wherein the first channel is delimited by a first internal surface of the main body, the second channel is delimited by a second internal surface of the main body, and
the first internal surface of the main body has a first area which is equal, by within less than 10%, to a second area of the second internal surface of the main body.

Assignees

• Safran Helicopter Engines

Inventors

• Savary Nicolas Roland Guy
• Berat Claude Marie Michel
• Lamaison Olivier
• Lameignere Yvan Ludovic
• Verdier Hubert Pascal
• Viguier Chritophe Nicolas Henri

Classifications

• F23R3/32 Primary

  being tubular · CPC title

• F02C7/22

  Fuel supply systems · CPC title

• F23R3/30

  comprising fuel prevapourising devices · CPC title