Variable-geometry turbine stator blade, particularly for...

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

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F01D 9/02 (2006.01) F01D 5/18 (2006.01) F01D 17/16 (2006.01)

Patent

CA 2436638

A blade for a stator of a variable-geometry turbine, particularly for aircraft engines; the blade has an airfoil profile hinged to a structure of the stator to rotate about an axis, and having a pressure front wall and a suction rear wall; the blade also has two end walls, which are located at opposite ends of the airfoil profile, cooperate in sliding manner with the structure of the stator, and are cooled, in use, by air flowing through a number of holes; the outlet of the holes are located close to the outer edges between the end walls and the front wall to generate a tangential stream of cooling air by virtue of the pressure difference acting on the front and rear walls.

Une aube pour un stator de turbine à géométrie variable, explicitement pour moteurs d'aéronef; l'aube comprend un profil d'aile fixé par charnière à une structure du stator pour tourner autour d'un axe, et ayant une paroi avant de pression et une paroi arrière de succion; l'aube est aussi dotée de deux parois d'extrémité, qui sont localisées à des extrémités opposées du profil d'aile, qui coopèrent d'une manière coulissante avec la structure du stator, et qui sont refroidies, à l'utilisation, par de l'air traversant un nombre d'orifices; la sortie des orifices est localisée près des bords extérieurs entre les parois d'extrémité et la paroi avant afin de générer un écoulement tangentiel d'air de refroidissement de la différence de pression agissant sur les parois avant et arrière.

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