Blade with non-axisymmetric platform: recess and boss on the...

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

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F01D 5/14 (2006.01)

Patent

CA 2714439

Blade (10) for a bladed disc (100) of a turbomachine comprising an aerofoil, and at least one platform (60) at one of the ends of the aerofoil, the blade (10) being able to be positioned, together with a plurality of substantially identical blades, in such a way as to form a ring around a ring axis (A). In the blade, an extrados profile (80) at the surface of the platform (60) and along the extrados (58) has a first recessed part (F) situated axially in an upstream half of the aerofoil (50) and a first boss-like part (G) situated axially downstream of the said first recessed part. This configuration improves the efficiency of the blade.

Aube (10) pour roue à aubes (100) de tarbomachine comportant un profilé aérodynamique, et au moins une plateforme (60) à une des extrémités du profilé, l'aube (10) étant apte à être disposée avec une pluralité d'aubes sensiblement identiques pour former une couronne autour d'un axe de couronne (A). Dans l'aube, un profil (80) d'extrados en surface de la plateforme (60) et le long de l'extrados (58) présente une première partie en creux (F) située axialement dans une moitié amont du profilé (50) et une première partie en bosse (G), située axialement en aval de ladite première partie en creux. Grâce à cette conformation, le rendement de l'aube est amélioré.

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