FUEL-AIR PREMIXER FOR A GAS TURBINE

摘要

The present disclosure relates to a fuel-air premixer for a turbine system. The fuel-air premixer includes a swirler and a centerbody. The swirler is configured to direct a flow of air through the premixer, and the centerbody is configured to inject fuel into the flow of air. Additionally, the centerbody includes an airfoil shape that reduces and/or substantially eliminates recirculation pockets to prevent autoignition and/or flame holding in a combustion chamber. Accordingly, the turbine system may produce fewer NOx emissions.

主权项

1. A fuel-air premixer for a gas turbine, comprising:
a dual counter-rotating swirler comprising a first rotor and a second rotor, wherein the first rotor and the second rotor are configured to spin about a shaft and the dual counter-rotating swirler is configured to direct a flow of air in a downstream direction; and a centerbody coupled to the dual counter-rotating swirler via the shaft, wherein the centerbody comprises first fuel orifices on a surface of the centerbody, the first fuel orifices are configured to inject fuel into the flow of air to create a fuel-air mixture, and the centerbody comprises an airfoil shape configured to reduce or eliminate formation of a recirculation pocket when in use.