Injectors for multipoint injection

摘要

An injector for a multipoint combustor system includes an inner air swirler which defines an interior flow passage and a plurality of swirler inlet ports in an upstream portion thereof. The inlet ports are configured and adapted to impart swirl on flow in the interior flow passage. An outer air cap is mounted outboard of the inner swirler. A fuel passage is defined between the inner air swirler and the outer air cap, and includes a discharge outlet between downstream portions of the inner air swirler and the outer air cap for issuing fuel for combustion. The outer air cap defines an outer air circuit configured for substantially unswirled injection of compressor discharge air outboard of the interior flow passage.

主权项

1. An airblast injector for a multipoint combustor system comprising:
an inner air swirler defining an interior flow passage and a plurality of swirler inlet ports in an upstream portion thereof configured and adapted for fluid communication of compressor discharge air through the swirler inlet ports into the interior flow passage such that swirl is imparted on flow in the interior flow passage; and an outer air cap mounted radially outboard of the inner swirler relative to a longitudinal axis defined by the inner air swirler and the outer air cap, with a fuel passage defined between the inner air swirler and the outer air cap, the fuel passage including a discharge outlet between downstream portions of the inner air swirler and the outer air cap for issuing fuel for combustion, and wherein the outer air cap defines an outer air circuit configured for substantially swirl-free injection of compressor discharge air outboard of the interior flow passage, wherein the outer air circuit is oriented to converge toward the longitudinal axis.