| 摘要 |
PURPOSE:To eliminate the unburnt range by providing an operating range for feeding only fuel between the fuel supply operation ranges at the first and second stages of gas turbine combustion chamber. CONSTITUTION:First stage fuel injection nozzle 19 is provided at the head 27 of gas turbine combustion chamber while second stage fuel feeder 21 is provided at the rear 27a. Under low load, combustion is performed at the head 27 while under intermediate/heavy load, specific fuel is fed at first only through an auxiliary burner 23 then upon increase of fuel from second stage fuel feeder 21 in step, fuel supply from the auxiliary burner 23 is reduced in step by same amount to switch to fuel supply from second stage. Since pre-mixed gas from second stage is switched completely upon entering into combustable range, unburnt range can be eliminated. |
