GAS TURBINE LOW-EMISSION COMBUSTION CHAMBER Russian patent published in 2008 - IPC F23R3/20 

FIELD: mechanical engineering; gas turbines.

SUBSTANCE: proposed low-emission combustion chamber of gas turbine operating, mainly, on compressed gas with low effluents of nitrogen oxides and carbon contains prechamber and cylindrical fire tube with air inlet holes arranged over circumference of fire tube. Prechamber consist at least of two modules with space for preliminary mixing of fuel and air. Ration of distance between axes of neighbor modules to inner diameter of fire tube is 0.4-0.5. Ratio of length of preliminary mixing space of each module to diameter of its exit nozzle is 0.6-0.8. Fire tube has fuel-air mixture burning space and space for mixing not gases with air. Fire tube contains solid inner wall and perforated outer envelope with ring channel in between to feed cooling air into mixing space. Ratio of length of burning space to inner diameter of fire tube is 0.9-1.1. Air feed holes are made in mixing space.

EFFECT: reduced emission of harmful substances owing to organization of "rich-lean" burning of fuel by preliminary mixing of fuel with air in prechamber and prevention of delivery of cooling air into burning zone.

2 cl, 2 dwg