초록 ▼

The present invention discloses a novel apparatus and way for directing a supply of compressed air into a fuel nozzle assembly for mixing with a fuel source. The apparatus comprises a fuel nozzle assembly having a plurality of coaxial tubes and radially-extending swirler vanes for directing a supply

The present invention discloses a novel apparatus and way for directing a supply of compressed air into a fuel nozzle assembly for mixing with a fuel source. The apparatus comprises a fuel nozzle assembly having a plurality of coaxial tubes and radially-extending swirler vanes for directing a supply of fuel to a mixing tube. Compressed air is directed to flow in a primarily axial direction by passing through a hemispherically-shaped dome portion at an air inlet region of the fuel nozzle assembly. The hemispherically-shaped dome includes a plurality of openings for directing air into the fuel nozzle assembly in a direction having a radial and axial component.

대표청구항 ▼

1. An air conditioning screen for use in a fuel nozzle assembly comprising: a substantially hemispherically-shaped dome comprising: an inner wall;an outer wall; and,a plurality of openings extending from the outer wall to the inner wall and angled in a downstream direction having both an axial and r

1. An air conditioning screen for use in a fuel nozzle assembly comprising: a substantially hemispherically-shaped dome comprising: an inner wall;an outer wall; and,a plurality of openings extending from the outer wall to the inner wall and angled in a downstream direction having both an axial and radial component;wherein the substantially hemispherically-shaped dome encompasses an air inlet region of a fuel nozzle assembly, wherein at least one of the plurality of air openings has a length and a diameter, with the length greater than the diameter, and wherein the substantially hemispherically-shaped dome extends between a base of the fuel nozzle assembly and proximate a premix tube of the fuel nozzle assembly. 2. The air conditioning screen of claim 1, wherein the first plurality of openings are located in at least two axially spaced rows. 3. The air conditioning screen of claim 2, wherein the substantially hemispherically-shaped dome has a thickness ranging between approximately 0.060 inches and 0.75 inches. 4. The air conditioning screen of claim 1 further comprising an annular plate having a curved cross sectional shape secured to the substantially hemispherically-shaped dome. 5. The air conditioning screen of claim 4, wherein the annular plate is spaced from the premix tube by a plurality of radially extending pins or struts.