Improvements to cooling circuits for gas turbine blade

F - Mech Eng,Light,Heat,Weapons – 01 – D

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F01D 5/18 (2006.01)

Patent

CA 2398663

A gas turbine blade (1) for an airplane engine, the blade comprising at least a first cooling circuit (A) comprising at least a concave side cavity (2) extending radially beside the concave face of the blade, at least a second cooling circuit (B) comprising at least one convex side cavity (4) extending radially beside the convex face of the blade, and at least one third cooling circuit (C) comprising at least one central cavity (6) situated in the central portion of the blade between the concave side cavity (2) and the convex side cavity (4), at least one leading edge cavity (8) situated in the vicinity of the leading edge of the blade, communication orifices opening out into the central cavity and into the leading edge cavity, and outlet orifices opening out into the leading edge cavity and through the leading edge of the blade.

Aube (1) de turbine à gaz d'un moteur d'avion comportant au moins un premier circuit de refroidissement (A) comprenant au moins une cavité intrados (2) s'étendant radialement du côté intrados de l'aube, au moins un deuxième circuit de refroidissement (B) comprenant au moins une cavité extrados (4) s'étendant radialement du côté extrados de l'aube, et au moins un troisième circuit de refroidissement (C) comprenant au moins une cavité centrale (6) située dans la partie centrale de l'aube entre la cavité intrados (2) et la cavité extrados (4), au moins une cavité bord d'attaque (8) située au voisinage du bord d'attaque de l'aube, des orifices de communication s'ouvrant dans la cavité centrale et débouchant dans la cavité bord d'attaque, et des orifices de sortie s'ouvrant dans la cavité bord d'attaque et débouchant sur le bord d'attaque de l'aube.

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