Fuel injector
AssigneeROLLS-ROYCE plc
InventorsJonathan F. CARROTTE, Stephen C. HARDING, Ashley G. BARKER
Life of this patent
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Abstract
A fuel injection system for a gas turbine engine comprises; a pilot fuel injector section and a main airblast fuel injector section, the main airblast fuel injector section having an aft end facing a combustion chamber. A surface of the injection system exposed to air flow through an injection system is non-axisymmetric or non-planar in a reference circumferential plane and/or is configured to generate controlled and varying acoustic impedance at or adjacent the aft end where, in use, the air flow collides with an oncoming acoustic wave.
Claims12
A fuel injection system for a gas turbine engine comprising;
- a main airblast fuel injector section,
- the main airblast fuel injector section having an aft end facing a combustion chamber and wherein
- a surface exposed to air flow through the injection system is non-axisymmetric, or, non-planar in a reference circumferential plane,
- the exposed surface is an annular wall of an air swirler and comprises an annular array of swirl vanes that are not symmetrical positioned around a circumference of the annular wall, and
- configured to generate acoustic impedance at or adjacent the aft end where, in use, the air flow collides with an oncoming acoustic wave.
Dependencies are inferred from the claim text.