FUEL INJECTOR

摘要

An injector includes: an upstream support plate (11) into which a fuel gas (F) is introduced and which has the shape of a tapered cylinder whose diameter gradually enlarges; a downstream support plate (12) that defines a plenum at an inner side along with the upstream support plate (11); and premixing tubes (13), each of which is supported by the upstream and downstream supporting plates (11 and 12) and introduces air. The plurality of premixing tubes (13) are disposed in a plurality of circular rows at equal intervals in a circumferential direction, and portions of the premixing tubes (13) which are located in the plenum are formed with fuel introducing holes (13a).

主权项

1. A fuel injector comprising:
an upstream support plate configured to introduce a fuel gas from a first end side into an inner side in a direction of an axis and having a shape of a tapered cylinder whose diameter gradually enlarges toward a second end side in the direction of the axis; a downstream support plate provided to intersect the axis, disposed at the second end side of the upstream support plate in the direction of the axis, and configured to define a plenum at an inner side along with the upstream support plate; and a plurality of premixing tubes provided to extend in the direction of the axis to be supported on the upstream and downstream support plates and configured to introduce air from the first end side in the direction of the axis, wherein the plurality of premixing tubes are disposed in rows shaped as a plurality of circles whose radial dimensions centered on the axis are different from each other, the neighboring premixing tubes disposed in the same row are disposed equidistantly from each other in a circumferential direction, portions of the premixing tubes which are located in the plenum are formed with fuel introduction holes penetrating the premixing tubes from outside to inside, andthe fuel gas supplied from the plenum into the premixing tubes via the fuel introduction holes is mixed with the air in the premixing tubes and is injected from second end sides of the premixing tubes in the direction of the axis.