Snecma

Safran Aircraft Engines

Sarah Chartier

Adrien Jacques Philippe Fabre

Christophe Paul Jacquemard

Dominik Igel

Sebastien Emile Philippe Tajan

Jean-Christophe Duffet

Sébastien Tajan

A jet pump type ejector for a turbomachine, including a duct through which a secondary ventilation air flow passes, and a first end of which forms an air intake and a second end of which forms an air outlet, the two nozzles for spraying a primary air flow being mounted in the duct which defines a mixer and a diffuser downstream from the nozzle, the two nozzles being parallel and adjacent to one another, the mixer including two substantially planar longitudinal walls, bottom and top respectively, connected to one another by two side walls having a semicircular cross-section, in which the radius of curvature R2 is centered on the axis of a nozzle, the center-to-center distance of the nozzles being substantially equal to &#x3a0;/2 times R2 or (&#x3a0;/2)R2.

Ventilation of a turbomachine nacelle

A control device of the pitch of blades of a rotor of a propeller is provided. The control device includes: a radial shaft; a pivot connected to the blade, the rotation of the radial shaft driving the rotation of the pivot for the modification of the pitch of the blade; an insert fixed rigidly to the pivot so as to block their relative displacement, the radial shaft being configured to drive in rotation the insert; at least one peg passing through the insert and the pivot for transmission of the rotation of the insert to the pivot; and a heat insulation element arranged between the insert and the pivot, whereof the thermal conductivity is less than the thermal conductivity of the pivot and of the radial shaft.

Control device for the pitch of blades, and propeller

The main purpose of the invention is a propeller () for a turbomachine () comprising a plurality of blades () and a blade support ring () fitted with housings () each of which holding a pivot () supporting the root () of one of said blades (), characterized in that at least one of the pivots () is associated with at least one dynamic scoop (), capable of moving between distinct positions, an open position in which a cooling airflow (F) can be captured, and a closed position as a function of the orientation of the corresponding blade.

Propeller comprising a moveable dynamic scoop

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Paris, France

Sarah Chartier