Fuel nozzle and assembly and gas turbine comprising the same

摘要

A nozzle for assemblies and gas turbines is provided. The nozzle exhibits destabilized flame holding characteristics, i.e., the nozzle is unable to stabilize flame up to an equivalence ratio of about 0.65. As a result, flame heat release is delayed resulting in lower peak flame temperatures and correspondingly lower NOx levels. Flame stabilization capability is retained for higher equivalence ratios to support operation of the combustor in other regions of the load range.

主权项

1. A gas turbine comprising a single stage of fuel injection, the gas turbine comprising:
a plurality of combustors located about the periphery of the gas turbine in the single stage, each combustor comprising: a plurality of outer fuel nozzles arranged about a longitudinal axis of the combustor and configured to provide fuel for ignition in a primary reaction zone of the gas turbine; a center nozzle disposed substantially along the longitudinal axis and configured to provide fuel propagatable downstream from the primary reaction zone prior to ignition in a second zone beyond the primary reaction zone.