Nozzle for a gas turbine combustor

Abstract

The disclosure concerns a nozzle for a gas turbine combustor, the nozzle comprising an inner channel, a swirl channel, a mixing zone and an outlet channel, wherein the nozzle extends from an inlet to an outlet, the swirl channel is disposed around the inner channel, the inner channel and the swirl channel extend from the inlet to the mixing zone, the mixing zone extends from the inner channel and the swirl channel to the outlet channel, and the outlet channel extends from the mixing zone to the outlet. A burner and a gas turbine comprising the nozzle are also described, along with a method of using the nozzle.

1 . A nozzle for a gas turbine combustor, the nozzle comprising an inner channel, a swirl channel, a mixing zone and an outlet channel, wherein
 the nozzle extends from an inlet to an outlet,   the swirl channel is disposed around the inner channel,   the inner channel and the swirl channel extend from the inlet to the mixing zone,   the mixing zone extends from the inner channel and the swirl channel to the outlet channel, and   the outlet channel extends from the mixing zone to the outlet.   
     
     
         2 . The nozzle of  claim 1 , arranged such that when in use 30 to 75% of a fuel goes through the inner channel. 
     
     
         3 . The nozzle of  claim 1 , further comprising a diffuser attached to the outlet channel and wherein the outlet channel extends from the mixing zone to the diffuser. 
     
     
         4 . The nozzle of any of  claims 1 , wherein the diameter of the inner channel is smaller than the diameter of the outlet channel. 
     
     
         5 . The nozzle of any of  claims 1 , wherein the nozzle is for use with a liquid fuel such as fuel oil, kerosene, diesel oil, or an emulsion of fuel oil, kerosene or diesel oil with water. 
     
     
         6 . The nozzle of  claim 1 , wherein the outlet channel opens directly into a combustion chamber. 
     
     
         7 . A fuel supply line comprising the nozzle of any of  claim 1 . 
     
     
         8 . A burner comprising the nozzle of  claim 1 . 
     
     
         9 . The burner of  claim 8 , wherein the burner comprises at least one shielding fluid hole disposed around the outlet of the nozzle. 
     
     
         10 . A gas turbine comprising a combustor comprising the nozzle of  claim 1 . 
     
     
         11 . A method of using nozzle for a gas turbine combustor, the nozzle comprising an inner channel, a swirl channel, a mixing zone and an outlet channel, wherein the nozzle extends from an inlet to an outlet, the swirl channel is disposed around the inner channel, the inner channel and the swirl channel extend from the inlet to the mixing zone, the mixing zone extends from the inner channel and the swirl channel to the outlet channel, and the outlet channel extends from the mixing zone to the outlet, the method comprising feeding a fuel through the nozzle and combusting the fuel in a combustion chamber. 
     
     
         12 . The method of  claim 11 , wherein the fuel is a liquid fuel such as fuel oil, kerosene, diesel oil, or an emulsion of fuel oil, kerosene or diesel oil with water.