Fuel injector
First Claim
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1. A variable geometry pre-mixing fuel injector for injecting a fuel/air mix in a downstream direction, comprising:
- an air inlet;
a fuel inlet positioned downstream of the air inlet;
a duct extending at least downstream of the fuel inlet to define a fuel and air pre-mixing zone, that narrows to form an opening; and
means for varying the flow of fuel/air mix from the pre-mixing zone through the opening.
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Abstract
A variable geometry pre-mixing fuel injector (50) for injecting a fuel/air mix in a downstream direction, comprising: an air inlet (60); a fuel inlet (58) positioned downstream of the air inlet (60); a duct (56) extending at least downstream of the fuel inlet (58) to define a fuel and air pre-mixing zone (62), that narrows to form an opening (64); and means for varying the flow of fuel/air mix from the pre-mixing zone (62) through the opening (64).
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Citations
16 Claims
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1. A variable geometry pre-mixing fuel injector for injecting a fuel/air mix in a downstream direction, comprising:
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an air inlet;
a fuel inlet positioned downstream of the air inlet;
a duct extending at least downstream of the fuel inlet to define a fuel and air pre-mixing zone, that narrows to form an opening; and
means for varying the flow of fuel/air mix from the pre-mixing zone through the opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A variable geometry pre-mixing fuel injector for injecting a fuel air mix in a downstream direction comprises a duct having an air inlet at a first end and an outlet for a fuel/air mix at a second end, a fuel inlet positioned downstream of the air inlet, the duct having a fuel and air pre-mixing zone downstream of the fuel inlet, the duct being defined between a duct wall and a centre body, the duct wall is frusto-conical and has an axis and the centre body is moveable along the axis of the duct wall to simultaneously vary the area of the opening and the area of the air inlet.
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16. A method of operating a combustor comprising a pre-mixing fuel injector and a combustor liner, comprising the steps of simultaneously:
varying the geometry of the combustor liner; and
varying the geometry of the pre-mixing zone, downstream of the fuel inlet of the pre-mixing fuel injecto
Specification