Snecma

Cenaero

Clement Marcel Maurice Dejeu

Jonathan Evert Vlastuin

Jerome Talbotec

Sebastien Pascal

Anthony Pascal Eloi Louet

Michael Leborgne

Ingrid Irene Catherine Lepot

A propeller blade extending radially between a blade root and a blade tip and having a leading edge and a trailing edge, together with a pressure side face and a suction side face. Along the leading edge, the angle (&#x3b1;) between the radial direction and a tangent to the leading edge passes through a local maximum zsituated in the range 60% to 80% of the height of the blade. Furthermore, the suction side face of the blade includes an indentation extending axially from the leading edge to the trailing edge and located at a height of the blade between the local maximum zand the blade tip.

Propeller blade for a turbomachine

The invention relates to an aircraft turboprop engine having two unducted propellers, coaxial about a rotation axis (LL), respectively upstream () and downstream (), each propeller comprising an annular row of blades, the blades of the downstream propeller () each having a truncated head and each comprising a leading edge () and a trailing edge (), the radially external ends (AB) of which are distant from each other and are connected by a terminal edge (), characterised in that the terminal edge () of each blade of the downstream propeller () has, at at least two points, tangents in a meridian plane having different slopes, the upstream end (A) of the terminal edge defining a maximum radial dimension (R) of the blade and its downstream end (B) defining a minimum radial dimension (R) of the terminal edge.

Aircraft turboprop engine comprising two coaxial propellers

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

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Fontenailles, France

Clement Marcel Maurice Dejeu