End-fed liquid fuel gallery for a gas turbine fuel injector

摘要

A fuel injector for a gas turbine engine may include an injector housing extending along a longitudinal axis and configured to be fluidly coupled to a combustor of the turbine engine. The fuel injector may also include a flow path for a fuel air mixture to the combustor extending longitudinally within the injector housing, and a gallery for liquid fuel encircling the flow path. The gallery may include a plurality of fuel spokes that are configured to deliver liquid fuel from the gallery to the flow path. The gallery may extend from a feed end to a terminal end that overlaps the feed end. The feed end may be a region where liquid fuel enters the gallery and the terminal end may be a region where the gallery terminates.

主权项

1. A fuel injector for a gas turbine engine comprising:
an injector housing extending along a longitudinal axis and configured to be fluidly coupled to a combustor of the gas turbine engine; a flow path for a fuel air mixture to the combustor extending longitudinally within the injector housing; and a gallery for liquid fuel encircling the flow path, the gallery including a plurality of fuel spokes that are configured to deliver liquid fuel from the gallery to the flow path, the gallery extending circumferentially around the flow path from a feed end to a terminal end that radially overlaps the feed end, the feed end being a region where liquid fuel enters the gallery and the terminal end being a region where the gallery terminates, the gallery wrapping around the flow path multiple times with each turn being radially and longitudinally displaced from another such that the gallery forms a helical path around the flow path; and wherein the plurality of fuel spokes are sequentially positioned along a length of the gallery and positioned symmetrically around the gallery and extending through a wall of a swirler and between vanes of the swirler, wherein a cross-sectional area of the gallery is substantially constant such that a velocity of the liquid fuel flowing in the gallery decreases from the feed end to the terminal end.