Snecma Propulsion Solide

Safran Ceramics

Safan Nacelles

Safran Nacelles

Herakles

Benoît Carrere

Eric Philippe

Bertrand Desjoyeaux

Eric Conete

Florent Bouillon

Thomas Revel

Laurent Baroumes

Gautier Mecuson

Patrick Joyez

Clément Bouquet

Roger Pays

Franck Dupe

A structure for the nacelle of an aircraft propulsion unit includes a first skin and stiffeners arranged to hold acoustic treatment modules against the first skin. Each acoustic treatment module includes a honeycomb core and a second skin, such that the honeycomb core is sandwiched between the first skin and the second skin. Such a structure allows the structural reinforcement function provided by the stiffeners to be separated from the acoustic treatment function performed by the acoustic treatment modules which are simply bearing on the first skin.

Acoustic treatment structure for an aircraft propulsion unit nacelle

The invention relates to a mixer () for a separate-stream nozzle of a turbojet, the mixer being designed to mix a hot inner stream from the combustion chamber of the turbojet with a cold outer stream from the fan of the turbojet. The mixer comprises an inner shroud () defining a flow channel for said hot inner stream, an outer shroud () disposed around the inner shroud () and co-operating therewith to define a flow channel for said cold outer stream, and a lobed structure () having lobes () extending longitudinally from the trailing edges () of said shrouds. The lobed structure () is made of a ceramic matrix composite material and is attached to the outer shroud () by flexible fastener tabs ().

CMC mixer with structural outer cowling

To provide a thermal connection that can withstand mechanical stress in a high temperature structure comprising a panel having one face carrying a circuit made up of tubes in which a fluid flows, the outside walls of the tubes are covered in respective high thermal conductivity textile layers. The structure further comprises holding means for holding the tubes pressed in non-rigid manner against the panel. The structure enables heat exchange to take place between the panel and the fluid in order to cool the panel, to heat the fluid, or indeed in order to do both.

High temperature heat exchanger structure

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Le Taillan Medoc, France

Benoît Carrere