OUTER PREMIX BARREL VENT AIR SWEEP Russian patent published in 2018 - IPC F02C7/22 F23R3/14 

FIELD: internal combustion engines.

SUBSTANCE: invention relates to gas turbine units, and in particular to fuel injectors with an outer premix barrel. Outer premix barrel includes a body portion, a barrel portion, and a plurality of vanes. Body portion includes vent air inlets. Barrel portion extends axially aft from the body portion. Plurality of vanes extends axially forward from the body portion. Each vane includes an inward surface located at a radially inner end of the vane, and a plurality of vent passages exiting the vane at the inward surface. Each vent passage is in flow communication with at least one vent air inlet. In addition, a fuel injector comprising an outer premix barrel, a method for overhauling thereof, as well as a gas turbine engine equipped with such an injector are provided. During gas turbine engine operation the vent passages sweep away fuel that may be collected in a low pressure area adjacent inward surface, which prevent auto-ignition or flame holding.

EFFECT: removable outer premix barrel facilitates access to other components within the injector and facilitates overhaul of the outer premix barrel.

10 cl, 7 dwg