Heat shield sealing for gas turbine engine combustor

F - Mech Eng,Light,Heat,Weapons – 02 – C

Patent

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F02C 7/24 (2006.01) F02C 3/14 (2006.01) F23R 3/60 (2006.01)

Patent

CA 2672457

A combustor heat shield sealing arrangement comprises a sealing rail extending from the combustor liner shell at the exit of the combustor for sealing engagement with a rail-less downstream end portion of the combustor heat shield. The sealing rail is offset relative to the downstream vane passage. Doing so may minimize the combustor/vane waterfall and, thus, minimize the horseshoe vortex effect at the leading edge of the turbine vanes.

Dispositif d'étanchéité pour chemise thermique de chambre de combustion comprenant un profilé d'étanchéité s'étendant de la coque de la chemise de la chambre de combustion à la sortie de la chambre pour entrer en prise de façon étanche avec une partie d'extrémité en aval sans profilé de la chemise thermique de la chambre de combustion. Le profilé d'étanchéité est décalé par rapport au passage d'aubes en aval. Il est ainsi possible de minimiser l'effet de cascade entre la chambre de combustion et l'aube, et donc de réduire l'effet de tourbillon en fer à cheval sur le bord d'attaque des aubes de turbine.

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