Aerodynamic adaptation of the rear fan of a double fan turbofan

Details Aerodynamic adaptation of the rear fan of a double fan turbofan Aerodynamic adaptation of the rear fan of a double fan turbofan

F - Mech Eng,Light,Heat,Weapons

02

C

F02C 3/06 (2006.01) F01D 17/16 (2006.01) F02C 3/067 (2006.01) F02C 3/073 (2006.01) F02K 3/065 (2006.01) F02K 3/072 (2006.01)

Patent

CA 2495992

The invention relates to aerodynamically matching the rear fan (3) of a turbojet having two fans (3, 5) and a low-pressure compressor (7) at the front of the intermediate casing (2), said fans being driven by two independent shafts (4, 6). Said compressor (7) is disposed between the blades (10, 14) of the two fans and includes at least one ring of rotor blades (40) around the periphery of a wheel (41) driven by the drive shaft (4) for the front fan (3), and at least two grids of stator vanes (45, 46) disposed on either side of the ring of rotor blades (40) and inside a grid carrier ring (47). A stationary outer grid (48) and a stator of variable pitch (50) connect the ring (47) to the fan casing (12).

L'invention concerne l'adaptation aérodynamique de la soufflante arrière (3) d'un turboréacteur ayant deux soufflantes (3, 5) à l'avant du carter intermédiaire (2) entraînées par deux arbres indépendants (4, 6) et un compresseur à basse pression (7). Ce compresseur (7) est disposé entre les pales (10, 14) des deux soufflantes et comporte au moins une couronne d'aubes mobiles (40) à la périphérie d'une roue (41) entraînée en rotation par l'arbre (4) de la soufflante avant (3) et au moins deux couronnes d'aubes fixes (45, 46) disposées de part et d'autre de la couronne d'aubes mobiles (40) et à l'intérieur d'un anneau porte grille (47). Une grille extérieure fixe (48) ainsi qu'un stator à calage variable (50) relient l'anneau (47) au carter de soufflante (12).

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