Combustion chamber assembly for an engine with at least one heat exchanger channel for fuel to be injected

Patent metadata

Field	Value
Publication number	US-12435876-B2
Application number	US-202217728371-A
Country	US
Kind code	B2
Filing date	Apr 25, 2022
Priority date	Apr 26, 2021
Publication date	Oct 7, 2025
Grant date	Oct 7, 2025

Abstract

A combustion chamber assembly for an engine includes a combustion chamber defining a combustion space delineated by a combustion chamber wall and extending in a main flow direction from a combustion chamber head to a combustion chamber outlet. A fuel injection system is joined to the wall at the combustion chamber head and has a fuel feed for fuel and a nozzle head for injecting the fuel into the combustion space. The wall also has an integrated heat exchanger duct via which the fuel is routed within a first duct section of the heat exchanger duct which is connected to the fuel line from the combustion chamber head in the direction of the combustion chamber outlet and, after flowing through a deflection region, in a second duct section of the heat exchanger duct, back in the direction of the combustion chamber head and of the nozzle head.

First claim

The invention claimed is:

1. A combustion chamber assembly for an engine, comprising
a combustion chamber that defines a combustion space delineated by a combustion chamber wall and extending in a main flow direction from a combustion chamber head to a combustion chamber outlet, and
a fuel injection system which is joined to the combustion chamber wall at the combustion chamber head and includes at least one fuel feed for fuel and a nozzle head for the injection of the fuel into the combustion space,
wherein the combustion chamber wall includes at least one integrated heat exchanger duct via which the fuel is routed within a first duct section of the heat exchanger duct which is connected to the at least one fuel feed from the combustion chamber head in a direction of the combustion chamber outlet and, after flowing through a deflection region, in a second duct section of the heat exchanger duct, back in a direction of the combustion chamber head and of the nozzle head;
wherein the deflection region is provided for cooling of at least one component of a turbine downstream of the combustion chamber.

2. The combustion chamber assembly according to claim 1 , wherein the combustion chamber wall includes an inner shell surface facing the combustion space and an opposing outer shell surface, and the first duct section adjoins the outer shell surface, while the second duct section adjoins the inner shell surface.

3. The combustion chamber assembly according to claim 1 , and further comprising a dividing wall between the first and second duct sections within the combustion chamber wall.

4. The combustion chamber assembly according to claim 1 , wherein the first duct section in the combustion chamber wall extends over a majority of a total length of the combustion space.

5. The combustion chamber assembly according to claim 1 , wherein the combustion chamber wall, based on the main flow direction, includes a radially outer wall section and a radially inner wall section, and the combustion chamber wall includes at least one integrated heat exchanger duct positioned in each of the radially outer wall section and the radially inner wall section.

6. The combustion chamber assembly according to claim 5 , wherein, via a distributor connected to the at least one fuel feed which is provided at the combustion chamber head, a fuel flow coming from the at least one fuel feed is divided between the at least one integrated heat exchanger duct positioned in each of the radially outer wall section and the radially inner wall section.

7. The combustion chamber assembly according to claim 6 , wherein the distributor is configured for equal distribution of the fuel flow between the at least one integrated heat exchanger duct positioned in each of the radially outer wall section and the radially inner wall section.

8. The combustion chamber assembly according to claim 6 , wherein the distributor is configured for distribution of the fuel flow in different portions between the at least one integrated heat exchanger duct positioned in each of the radially outer wall section and the radially inner wall section.

9. The combustion chamber assembly according to claim 6 , and further comprising a fuel line for the supply of the fuel at the nozzle head is provided at the combustion chamber head, and each of the at least one integrated heat exchanger ducts include a second duct section connected to the fuel line.

10. The combustion chamber assembly according to claim 9 , wherein the fuel is guided via the fuel line on the combustion chamber head side, by which the heat exchanger ducts of the combustion chamber wall are connected, to the heat exchanger ducts of the top portion that forms the nozzle head of the fuel injection system.

11. The combustion chamber assembly according to claim 6 , wherein each of the at least one integrated heat exchanger ducts is connected to one another beyond the combustion chamber head.

12. The combustion chamber assembly according to claim 11 , wherein both of the at least one integrated heat exchanger ducts are connected to one another via the deflection region.

13. The combustion chamber assembly according to claim 12 , wherein a first duct section of any of the at least one integrated heat exchanger duct is connected via the deflection region to a second duct section of another of the at least one integrated heat exchanger duct, such that the fuel is routed first within the radially inner or radially outer wall section of the combustion chamber wall in the direction of the combustion chamber outlet and then is routed in the other, radially outer or radially inner, wall section back in the direction of the combustion chamber head.

14. The combustion chamber assembly according to claim 1 , wherein the combustion chamber assembly is configured for injection of a gaseous fuel.

15. An engine with a combustion chamber assembly according to claim 1 .

16. A combustion chamber assembly for an engine, comprising:
a combustion chamber that defines a combustion space delineated by a combustion chamber wall and extending in a main flow direction from a combustion chamber head to a combustion chamber outlet, and
a fuel injection system which is joined to the combustion chamber wall at the combustion chamber head and includes at least one fuel feed for fuel and a nozzle head for injection of the fuel into the combustion space,
wherein the combustion chamber wall includes at least one integrated heat exchanger duct via which the fuel is routed within a first duct section of the heat exchanger duct which is connected to the at least one fuel feed from the combustion chamber head in a direction of the combustion chamber outlet and, after flowing through a deflection region, in a second duct section of the heat exchanger duct, back in a direction of the combustion chamber head and of the nozzle head;
wherein integrated in a top portion provided at the combustion chamber head and configured for provision of an air-fuel mixture, at an end face facing the combustion space, are a plurality of first outflow openings for fuel and a plurality of second outflow openings for air, and heat exchanger ducts for heat transfer between fuel flowing to the first outflow openings in the top portion and air flowing to the second outflow openings in the top portion.

17. The combustion chamber assembly according to claim 16 , wherein integrated in the top portion are a plurality of heat exchanger ducts for fuel and a plurality of heat exchanger ducts for air.

18. The combustion chamber assembly according to claim 17 , wherein the plurality of heat exchanger ducts for fuel and the plurality of heat exchanger ducts for air are distributed uniformly in the top portion.

19. The combustion chamber assembly according to claim 16 , wherein the first and second outflow openings are disposed in uniform distribution at the end face of the top portion.

20. The combustion chamber assembly according to claim 16 , wherein at least some of the first and second outflow openings are disposed in a pattern at the end face of the top portion in which adjacent outflow openings are separated by an elongated land in a front view of the end face.

21. The combustion chamber assembly according to claim 16 , wherein the first and/or second outflow openings have a circular or polygonal, square, rhombus-shaped or hexagonal, cross section.

22. The combustion chamber assembly according to claim 16 , wherein a plurality of inflow openings for air to be route

Assignees

• Rolls Royce Deutschland Ltd & Co Kg

Inventors

• Clemen Carsten

Classifications

• F23R3/283

  Attaching or cooling of fuel injecting means including supports for fuel injectors, stems, or lances · CPC title

• F23R3/002

  Wall structures (F23R3/02 and F23R3/007 take precedence) · CPC title

• F23R2900/00002

  Gas turbine combustors adapted for fuels having low heating value [LHV] · CPC title

• F02C7/224

  Heating fuel before feeding to the burner · CPC title

• F23R3/005 Primary

  Combined with pressure or heat exchangers · CPC title