Tw0-head staged annular combustion chamber

Details Tw0-head staged annular combustion chamber Tw0-head staged annular combustion chamber

F - Mech Eng,Light,Heat,Weapons

23

R

F23R 3/28 (2006.01) F23R 3/00 (2006.01) F23R 3/34 (2006.01) F23R 3/50 (2006.01)

Patent

CA 2398669

An offset annular combustion chamber (1) for an airplane engine gas turbine, the chamber comprising a pilot head (12) having a plurality of nozzle systems distributed on a pilot head chamber end wall (8) interconnecting an inner longitudinally-extending side wall (4) of the chamber (6) to a pilot head outer longitudinally-extending side wall, and a take-off head (14) that is radially and axially offset from the pilot head (12) and comprising a plurality of nozzle systems distributed on a take-off head chamber (10) end wall interconnecting the pilot head outer longitudinally-extending side wall (6) and a take-off head outer longitudinally-extending side wall (2) , the pilot head (12) having at least N substantially identical nozzle systems with overall permeability PA adapted to lighting and to speeds close to idling, and the take-off head (14) having at least 2N substantially identical nozzle systems of overall permeability PB, where PB is greater than or equal to PA, the permeability PA lying in the range 10% to 40% of the total air flow rate penetrating into the chamber and the permeability PB lying in the range 30% to 70% of the total air flow rate penetrating into the chamber.

Chambre de combustion (1) annulaire étagée de turbine à gaz d'un moteur d'avion, comprenant une tête pilote (12) comportant plusieurs systèmes d'injection répartis sur un fond de chambre (8) de tête pilote reliant une paroi longitudinale interne (4) de la chambre à une paroi longitudinale externe (6) de la tête pilote, et une tête décollage (14) radialement et axialement décalée de la tête pilote (12) comportant plusieurs systèmes d'injection répartis sur un fond de chambre (10) de tête décollage reliant la paroi longitudinale externe (6) de la tête pilote à une paroi longitudinale externe (2) de la tête décollage, la tête pilote (12) comportant au moins N systèmes d'injection sensiblement identiques de perméabilité globale PA, adaptés à l'allumage et aux régimes voisins du ralenti, la tête décollage (14) comportant au moins 2N systèmes d'injection sensiblement identiques de perméabilité globale PB, PB étant supérieure ou égale à PA, la perméabilité PA étant comprise entre 10 % et 40 % du débit d'air total qui entre dans la chambre et la perméabilité PB étant comprise entre 30 % et 70 % du même débit d'air.

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