Snecma Moteurs

Societe Nationale D'etude Et De Construction De Moteurs D'aviation

Philippe Fessou

Bruno Albert Beutin

Jean-Louis Charbonnel

Jerome Talbotec

Andre C Collot

Monique A Thore

Daniel J Martin

Claude Dejaune

Beatrice Bois

Mario Blozovski

Jean-Francois Ranvier

Herve Quiniou

Herve Paitre

Jean-Claude Gregoire

Herbert Joly

Alain Espenel

A nozzle vane for a rotary disk of a turbomachine, the vane comprising pressure side and suction side surfaces extending radially between a base and a tip and longitudinally between a leading edge and a trailing edge, with a plurality of vane sections having centers of gravity aligned along a stacking axis, the vane presenting a lower portion, an intermediate portion, and an upper portion, the lower portion extending radially between the base of the vane and a lower limit of the intermediate portion, and the upper portion extending radially between an upper limit of the intermediate portion and the tip of the vane, the stacking axis presenting, in the lower and upper portions, a tangential component that is substantially radial, and in the intermediate portion, a tangential component with two slopes.

Nozzle vane with two slopes

A rotary turbojet blade comprises a plurality of blade sections extending along a line of the centers of gravity of said sections between a base and a tip, said blade presenting along a radial axis a bottom portion, an intermediate portion, and a top portion, said bottom portion presenting a longitudinal angle of inclination for a leading edge line, said intermediate portion presenting a backward longitudinal angle of inclination for said leading edge line, and said top portion presenting a backward longitudinal angle of inclination for said leading edge line and a tangential angle of inclination for said line of the centers of gravity in a direction opposite to the direction of rotation of said blade.

Backswept turbojet blade

The arrangement of a gas turbine engine suitable for high bypass ratio aircraft engines in which gases circulate in a primary air channel (7) and a secondary channel (8) concentric to said primary air channel, is characterized in that structural vanes (22) connecting the channel delimitation casings (2, 10, 14, 5) with each other, alternate with aerodynamic vanes (20) for guiding the gases on a common circumference of the engine bypass air channel (8), and in that the structural channels branch out between the two channels. The resulting advantages are simplicity of construction associated with a reduction in the space required for housing the channels and good resistance without notable increase of the total mass.

Arrangement of gas turbine engine comprising aerodynamic vanes and

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Melun, France

Philippe Fessou