Aerodynamically enhanced fuel nozzle
First Claim
1. A gas turbine engine fuel nozzle assembly comprising:
- a pilot fuel injector tip substantially centered about a centerline axis in an annular pilot inlet to a pilot mixer,a cross over arm extending radially across the annular pilot inlet to the pilot fuel injector tip,the cross over arm including an arm fairing surrounding at least one fuel transfer tube to the pilot fuel injector tip,a pilot nose cap located at an upstream end of the pilot fuel injector tip, andat least one of the cross over arm and the pilot nose cap including a rounded forebody followed by a straight afterbody.
1 Assignment
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Accused Products
Abstract
A gas turbine engine fuel nozzle assembly includes a pilot fuel injector tip substantially centered about a centerline axis in an annular pilot inlet to a pilot mixer. A cross over arm extends across inlet to tip. Arm includes an arm fairing surrounding at least one fuel transfer tube to tip. A pilot nose cap is at an upstream end of tip. At least one of the cross over arm and the pilot nose cap includes a rounded forebody followed by a straight afterbody. Rounded forebody of pilot nose cap includes a substantially rounded dome extending forwardly from a rounded nose base and straight afterbody includes a substantially cylindrical nose afterbody parallel to a pilot nose centerline normal to nose base. An arm fairing surrounding fuel transfer tubes to tip includes rounded leading and trailing edges and a rectangular middle section therebetween having flat first and second sides.
65 Citations
28 Claims
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1. A gas turbine engine fuel nozzle assembly comprising:
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a pilot fuel injector tip substantially centered about a centerline axis in an annular pilot inlet to a pilot mixer, a cross over arm extending radially across the annular pilot inlet to the pilot fuel injector tip, the cross over arm including an arm fairing surrounding at least one fuel transfer tube to the pilot fuel injector tip, a pilot nose cap located at an upstream end of the pilot fuel injector tip, and at least one of the cross over arm and the pilot nose cap including a rounded forebody followed by a straight afterbody. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A gas turbine engine fuel nozzle assembly comprising:
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a pilot fuel injector tip substantially centered about a centerline axis in an annular pilot inlet to a pilot mixer, a cross over arm extending radially across the annular pilot inlet to the pilot fuel injector tip, a pilot nose cap located at an upstream end of the pilot fuel injector tip, the pilot nose cap including a rounded forebody followed by a straight afterbody, the rounded forebody including a substantially rounded dome extending axially forwardly or upstream from a rounded nose base, and the straight afterbody including a substantially cylindrical nose afterbody extending axially aftwardly or downstream from the nose base and parallel to a pilot nose centerline perpendicular or normal to the nose base. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A gas turbine engine fuel nozzle assembly comprising:
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a pilot fuel injector tip substantially centered about a centerline axis in an annular pilot inlet to a pilot mixer, a cross over arm extending radially across the annular pilot inlet to the pilot fuel injector tip, the cross over arm including an arm fairing surrounding at least one or more fuel transfer tubes to the pilot fuel injector tip, the arm fairing including rounded leading and trailing edges and a rectangular middle section extending therebetween, and the rectangular middle section including generally flat and generally circumferentially spaced apart flat first and second sides. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification