Gas turbine engine staged fuel injection using adjacent bluff body and swirler fuel injectors

摘要

A fuel injection array for a gas turbine engine includes a plurality of bluff body injectors and a plurality of swirler injectors. A control operates the plurality of bluff body injectors and swirler injectors such that bluff body injectors are utilized without all of the swirler injectors at least at low power operation. The swirler injectors are utilized at higher power operation.

主权项

1. A fuel injection array for a gas turbine engine comprising:
a plurality of bluff body injectors and a plurality of swirler injectors; a control for operating said plurality of bluff body injectors and said swirler injectors such that said bluff body injectors are utilized without all of the swirler injectors at least at low power operation, and said swirler injectors are utilized at higher power operation; and said bluff body injectors include a central flow passage leading to a pilot port communicating fuel directly into a combustion chamber, said bluff body injectors also communicate fuel into locations upstream of the combustion chamber where the fuel is mixed with air prior to it reaching the combustion chamber, a fuel supply line leads into said central flow passage, and ports extend from said fuel supply line to locations on opposed sides of said central flow passage to intermix with air flowing along said opposed sides.