Patent ID: 7926279

Claim:
A fuel injector assembly for a gas turbine engine combustor comprising a support housing configured to support a plurality of fuel injector assemblies, the fuel injector assembly comprising: a fuel injector comprising a base end adapted to attach to a combustor support housing and a distal end adapted for attachment to a swirler assembly, a fuel injector inner surface defining an outer boundary of a first fluid communication path from the base end to first fuel injector outlets disposed through the distal end; and a gas sleeve adapted to attach at a gas sleeve upstream end to the support housing and provide a second fluid communication path configured to convey a fuel gas from a fuel gas supply disposed in the support housing to the first fluid communication path, the gas sleeve fitting within the fuel injector and comprising a plurality of apertures proximate the gas sleeve upstream end formed to provide impingement cooling of the fuel injector base end, and a gas sleeve downstream aperture to provide fuel gas to the injector downstream of the plurality of apertures.