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US 8,297,057 B2Granted
Fuel injector
AssigneeROLLS-ROYCE plc
InventorIan J. Toon
Life of this patent
Estimating the term…
Abstract
A fuel injector head for a gas turbine engine the head having a pilot injector and a main injector located radially outwardly of the pilot injector. A concentric splitter separates the pilot injector from the main injector and has a toroid chamber which is supplied with air in use to generate a toroidal flow which delays mixing of the pilot and main air flows.
Claims14
A fuel injector assembly for a gas turbine engine the assembly comprising:
- a pilot injector having a central axis;
- a main injector located radially outwardly of the pilot injector;
- a concentric splitter separating the pilot injector from the main injector and bounding a volume through which in use a fuel injected by the pilot injector flows, the concentric splitter having a cavity,
- wherein the splitter has a toroid chamber that is supplied with air in use to generate a toroidal flow, the toroid chamber having an axially rearward surface through which air is supplied to the toroid chamber and an open axially forward surface, and
- an aperture that supplies the air and has an axis that extends substantially secantially from the cavity to the toroid chamber.
2 more elements
An annular combustor of a gas turbine engine comprising a fuel injector assembly, the fuel injector assembly further comprising:
- a pilot injector having a central axis;
- a main injector located radially outwardly of the pilot injector;
- a concentric splitter separating the pilot injector from the main injector and bounding a volume through which in use a fuel injected by the pilot injector flows,
- wherein the splitter has a toroid chamber that is supplied with air in use to generate a toroidal flow, the toroid chamber having an axially rearward surface through which air is supplied to the toroid chamber and an open axially forward surface,
- the annular combustor defines a combustion volume with the open axially forward surface bounding a portion of the combustion volume,
- the toroid chamber has a circulating flow of air, the air at the axially rearward surface moving in a direction towards the axis and the air at the axially forward open surface moving radially away from the axis, and
- the air at the axially forward open surface sheds to the combustion volume.
4 more elements
Dependencies are inferred from the claim text.