Combustion chamber/venturi cooling for a low nox emission...

Details Combustion chamber/venturi cooling for a low nox emission... Combustion chamber/venturi cooling for a low nox emission...

F - Mech Eng,Light,Heat,Weapons

02

C

F02C 1/00 (2006.01) F02G 3/00 (2006.01) F23R 3/18 (2006.01) F23R 3/28 (2006.01) F23R 3/32 (2006.01)

Patent

CA 2468646

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 gas turbine engine that includes providing an annular air passage (14) surrounding the combustion chamber/venturi near the aft portion of the combustion chamber (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 the 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 premix chamber (12) thereby improving the efficiency of the combustor (10) while lowering the NOx emission in the combustion process.

L'invention concerne un procédé et un appareil de refroidissement d'air du venturi (11) et de la chambre de combustion (13) d'un dispositif de combustion (10) à faible émission de Nox, tel que ceux utilisés dans un moteur de turbine à gaz, comprenant un passage d'air annulaire (14) entourant la chambre de combustion/venturi près de la partie arrière de la chambre de combustion (13) permettant à l'air de passer le long de la chambre de combustion (13), à côté du venturi (11) où sort (28) l'air près de la partie avant de la zone convergente du venturi (11). L'air de refroidissement est chauffé tandis qu'il passe sur la chambre de combustion (13) et le venturi (11), puis est redirigé dans la chambre (12) de mélange préalable, améliorant ainsi l'efficacité du dispositif (10) de combustion tout en réduisant l'émission de NOx au cours du processus de combustion.

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