Dual-mode nozzle assembly with passive tip cooling
AssigneeSiemens Westinghouse Power Corporation
InventorsDavid James Wiebe, David D. North, William Richard Ryan
Life of this patent
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Abstract
A flame-holding nozzle for a combustion turbine engine is disclosed. The nozzle includes several elongated sleeves in a substantially concentric arrangement. The sleeves cooperatively provide distinct passageways for fluids to move through the nozzle. The nozzle includes conduits that advantageously direct fluids to designated regions of the nozzle, allowing fuel and cooling fluid to move within the nozzle without becoming commingled. Portions of the nozzle sleeves are also strategically arranged to transmit fluids in a manner that provides substantially-uniform thermal expansion, thereby reducing the need for sliding joints or bellows arrangements.
Claims17
A dual-mode fuel nozzle for a combustion engine, said nozzle comprising:
- an elongated first sleeve characterized by an upstream end and an opposite downstream end;
- a supplemental sleeve disposed radially inward of said first sleeve, said first and supplemental sleeves defining a first fuel passageway therebetween, said first fuel passageway including an inlet and an exit, said inlet being adapted for fluid communication with a source of fuel;
- a second sleeve disposed radially inward of said supplemental sleeve said supplemental and second sleeves defining a supplemental fuel passageway therebetween, said supplemental fuel passageway including an inlet and an exit, said an inlet being adapted for fluid communication with a source of fuel;
- a third sleeve disposed radially inward of said second sleeve, said second and third sleeves defining a cooling fluid passageway therebetween, said cooling fluid passageway having an inlet and an exit;
- and
- a cooling fluid conduit adapted to fluidly connect said cooling fluid passageway with a source of cooling fluid, said conduit having a conduit entrance located upstream of said fuel passageway exit and a conduit exit in fluid communication with said cooling fluid passageway inlet,
- whereby said cooling fluid conduit, said cooling fluid passageway, and said fuel passageways cooperatively ensure that cooling fluid passing through said cooling fluid passageway exit is substantially fuel-free during operation.
Dependencies are inferred from the claim text.