COMBUSTION CHAMBER/VENTURI COOLING FOR A LOW NOX EMISSION COMBUSTOR

摘要

A method and apparatus for providing air cooling to the venturi (11) and the combustion chamber (13) in a low NOx emission combustor (10) as used in a ga s turbine engine that includes providing an annular air passage (14) surroundi ng the combustion chamber/venturi near the aft portion of the combustion chambe r (13) passing the air along the combustion chamber (13), past the venturi (11 ) where the air exits (28) near the front portion of the convergent area of th e venturi (11). The cooling air is heated as it passes over the combustion chamber (13) and the venturi (11) and then it is directed back into the prem ix chamber (12) thereby improving the efficiency of the combustor (10) while lowering the NOx emission in the combustion process.