Compressor of a gas turbine and gas turbine

F - Mech Eng,Light,Heat,Weapons – 04 – D

Patent

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Details

F04D 21/00 (2006.01) F01D 5/14 (2006.01) F04D 29/32 (2006.01)

Patent

CA 2558325

The invention relates to a compressor, particularly a high-pressure compressor, of a gas turbine, particularly of an aircraft engine. The compressor comprises at least one rotor and a number of blades (11, 12), which are assigned to the or to each rotor and which rotate together with the respective rotor. Each blade (11, 12) is delimited, in essence, by a flow entry edge or leading edge (16), a flow exit edge or trailing edge (17), and by a blade surface (20), which extends between the leading edge (16) and the trailing edge (17) while forming a suction side (18) and a pressure side. According to the invention, the leading edges (16) of the blades (11, 12) are slanted at a sweep angle that changes with the height of the respective blade (11, 12) in such a manner that the leading edges (11) comprise, in a radially external area (23) of the same, at least one forward sweep angle, a backward sweep angle or zero-sweep angle following in a radially external manner, and a forward sweep angle following, in a radially external manner, the backward sweep angle or the zero-sweep angle.

L'invention concerne un compresseur, notamment un compresseur à haute pression, d'une turbine à gaz, notamment d'un groupe motopropulseur. Le compresseur selon l'invention comprend au moins un rotor et plusieurs aubes mobiles (11, 12) associées au rotor ou à chaque rotor et tournant avec leur rotor respectif. Chaque aube mobile (11, 12) est pratiquement délimitée par un bord d'entrée de courant ou bord d'attaque (16), par un bord de sortie de courant ou bord de fuite (17) et par une surface d'ailette (20) s'étendant entre le bord d'attaque (16) et le bord de fuite (17) et formant un extrados (18) et un intrados. Selon l'invention, les bords d'attaque (16) des aubes mobiles (11, 12) sont inclinés d'un angle de flèche variant avec la hauteur de l'aube mobile correspondante (11, 12), de sorte que les bords d'attaque (16) présentent dans leur zone externe radiale (23) au moins un angle de flèche avant, un angle de flèche arrière ou un angle de flèche nulle adjacent de manière radiale extérieure à l'angle de flèche avant et un angle de flèche avant adjacent de manière radiale extérieure à l'angle de flèche arrière ou à l'angle de flèche nulle.

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