| 摘要 |
PROBLEM TO BE SOLVED: To provide novel combustion system designs that reduce emissions particularly of NOx and enable higher firing temperatures.SOLUTION: A gas turbine engine includes: a combustor coupled to a turbine; and a downstream injection system that includes two injection stages, a first stage and a second stage, positioned within an interior flowpath, where the first stage has an axial position aft of a primary air and fuel injection system and the second stage having an axial position aft of the first stage. Each of the first stage and the second stage includes a plurality of circumferentially spaced injectors, each of which is configured to inject air and fuel into a flow through the interior flowpath. The first stage and the second stage have a configuration that limits a fuel injected at the second stage to less than 50% of a fuel injected at the first stage. |
