Gas turbine engine fuel injector
AssigneeWoodward, Inc.
InventorsMark G. Goeddeke, Michael Stratton
Life of this patent
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Abstract
The subject matter of this specification can be embodied in, among other things, a fuel injector for a gas turbine engine includes a fuel injector housing, and an elongated fuel tube held in position in said housing by spaced apart joints and including an undulating tube surface along at least a portion of its length between said joints, said undulating tube surface being in contact with another surface disposed in said housing at one or more locations of said undulating tube surface.
Claims22
A fuel injector for a gas turbine engine, comprising:
- a fuel injector housing;
- and
- a first elongated fuel tube held in position in said housing by spaced apart joints and including a first undulating tube surface along at least a portion of a length of the elongated fuel tube between said joints, said first undulating tube surface being in contact with another surface defined by said housing at one or more locations of said first undulating tube surface, wherein the first undulating tube surface comprises one or more of a pseudo-random, sinusoidal, or serpentine shape.
A fuel injector for a gas turbine engine, comprising:
- a fuel injector housing having an internal wall and internal passage therein;
- an elongated secondary fuel tube disposed in said internal passage, said elongated secondary fuel tube having an undulating outer surface along at least a portion of its length and having an undulating inner surface along at least a portion of its length, said undulating outer surface being in contact with said internal wall at one or more locations of said undulating outer surface;
- and
- an elongated primary fuel tube disposed in said secondary fuel tube and held in position therein by spaced apart joints, said primary fuel tube including an elongated outer surface along at least a portion of its length between said joints, said elongated outer surface being in contact with said undulating inner surface at one or more locations of said elongated outer surface to reduce fatigue failure at said joints during service in a gas turbine engine.
An assembly for a fuel injector, comprising an elongated first fuel tube and an elongated second fuel tube disposed in said first fuel tube, one of said first fuel tube and second fuel tube including a undulating surface along at least a portion of its length, said undulating surface being in contact between said first fuel tube and second fuel tube at one or more locations of said undulating surface.
A method of assembly comprising:
- bending an elongated fuel tube having a tube surface such that the tube surface is an undulating tube surface along at least a portion of its length;
- and
- contacting the undulating tube surface to another surface disposed in a fuel injector housing at one or more locations of said undulating tube surface.
Dependencies are inferred from the claim text.