Snecma

Snecma Moteurs

Cenaero

Jerome Talbotec

Jean-Pierre Lombard

Laurent Jablonski

Hanna Reiss

Clement Marcel Maurice Dejeu

Philippe Fessou

Sebastien Pascal

Sandrine Quevreux

Michael Leborgne

Ingrid Irene Catherine Lepot

Eric Pierre Maurice Lippinois

Edouard De Jaeghere

Philippe Minot

Herbert Joly

Beatrice Bois

A turbomachine vane including a plurality of vane sections stacked along a radial axis, each vane section extending along a longitudinal axis between a leading edge and a trailing edge, and along a tangential axis between an active surface and a passive surface, the vane sections being distributed according to longitudinal and tangential distribution laws defining positioning of respective centers of gravity thereof in relation to the longitudinal and tangential axes according to a height of the vane extending from a foot of the vane to a top thereof. Each of the longitudinal and tangential distribution laws involves a change in direction of the slope at between 90% and 100% of the height of the vane.

Turbomachine vane having an airfoil designed to provide improved aerodynamic and mechanical properties

A propulsion device including an unducted upstream propeller and a counter-rotating and coaxial downstream propeller. At least one blade of the upstream propeller is configured to generate a corotating secondary vortex for acting upstream of the downstream propeller to destabilize a blade tip vortex of the same at least one blade.

Propulsion device having unducted counter-rotating and coaxial rotors

An airplane having at least one turbojet and means for taking at least a portion of the boundary layer of the flow of air over a surface of the airplane and for guiding the air that has been taken to an air inlet of the turbojet, the airplane being characterized in that the means for guiding air include means for diffusing the air that has been taken circumferentially in uniform manner over 360&#xb0; at the air inlet of the turbojet.

Airplane including means for taking at least a portion of the boundary layer of the flow of air over a surface

A method for reducing the vibration levels capable of occurring, in a turbine engine including at least one propeller and one coupling structure of the turbine engine, because of the turbulence of aerodynamic origin generated by the coupling structure on the propeller. The method includes: defining an initial configuration of the aerodynamic profiles, calculating the synchronous forced response on the propeller as a function of the force of harmonic excitation generated by the coupling structure expressed in the form of a linear function of the generalized aerodynamic force for the mode in question, and determining a tangential geometric offset value &#x3b8; of the individual aerodynamic profiles for stacked sections of one of the propeller or of the coupling structure in order to reduce the term corresponding to the generalized aerodynamic force. The combination of the sections with the tangential offsets therefore defines a new configuration of the aerodynamic profiles.

Method for reducing the vibration levels of a propeller of a turbine engine

A method for reducing the vibration levels likely to occur, in a turbine engine including a first and a second bladed disk forming a propfan of contrarotating disks, when the two disks are traversed by a gaseous fluid, because of the turbulence of aerodynamic origin generated by the second bladed disk on the first bladed disk is disclosed. The method includes defining an initial configuration of the blades, calculating the synchronous forced response on the first bladed disk as a function of the harmonic excitation force generated by the second bladed disk expressed as a linear function of the generalized aerodynamic force for the mode in question; for stacked sections of one of the two disks, determining a tangential geometric offset value &#x3b8; of the individual aerodynamic profile to reduce the term corresponding to the generalized aerodynamic force; and applying a new configuration to the blades.

Method for reducing the vibration levels of a propfan of contrarotating bladed disks of a turbine engine

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

Growing community of inventors

Combs la Ville, France

Jerome Talbotec