System having multi-tube fuel nozzle with floating arrangement of mixing tubes

摘要

A system includes a multi-tube fuel nozzle. The multi-tube fuel nozzle includes an end cover, a first plate, and multiple tubes. The multiple tubes are disposed and supported in a floating arrangement between the end cover and the first plate. Each tube includes a forward end adjacent the end cover and an aft end adjacent the first plate.

主权项

1. A system, comprising: an end cover assembly; and a multi-tube fuel nozzle, comprising: a first plate; a plurality of premixer tubes supported in a floating arrangement between the end cover assembly and the first plate, wherein each premixer tube comprises a forward end adjacent the end cover assembly and an aft end adjacent the first plate, the forward end of each premixer tube is disposed about a fuel injector, each premixer tube extends through the first plate into a combustor chamber, and each premixer tube is configured to receive fuel and air and deposit a fuel-air mixture into the combustion chamber and a radial spring disposed about at least one premixer tube of the plurality of premixer tubes, wherein the radial spring is circumferentially disposed relative to a longitudinal axis of the multi-tube fuel nozzle about the fuel injector, and a portion of the radial spring contacts an inner surface of the at least one premixer tube and an outer surface of the fuel injector and is radially disposed relative to the longitudinal axis between the inner surface of the at least one premixer tube and the outer surface of the fuel injector.