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

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

Thierry Henri Tassin

Jacky S Naudet

Jean-Louis Charbonnel

Jean-Claude Christian Taillant

Jean-Claude L Delonge

Christophe Bernard Texier

Xavier G Coudray

Guy Franck Dusserre-Telmon

Mischael F Derrien

Jean-Pierre Galivel

Gerard R Vermont

Philippe Christian Pellier

Laurent Gille

Jean-Christophe M Cordier

jean-Michel Roger Fougeres

Yves Maurice Bailly

Corrine G Delahaye

Didier M Nouveau

A turbine vane-system cooling system uses three internal cooling cavities 1, 12, 13) separated by two radial walls (9, 10). The upstream cavity (11) uses a helical ramp (30) and is fed through an intake (22) at the vane root (3). The middle cavity (12) also is fed at the vane root (3) and includes a compartmented, multi-perforated lining (40). The air is exhausted from each compartment through impact orifices and enters the succeeding compartment through slots (42) and then is finally exhausted through a vane-head orifice (21). The vane side walls opposite the downstream cavity (13) have double skins with bridging elements. The air passes through these double skins but circulates centrifugally in the upstream portion (15) of the downstream cavity (13) and enters this cavity's downstream portion (16) to be exhausted through slots (19) in the trailing edge (6). A third wall (14) divides the downstream cavity (13) into two parts (15, 16).

Turbine vane cooling system

A device for ensuring the sealing in a rotary machine between a rotor and fixed blade stages. Blade edges are joined by rings carrying circular seals in slots. Springs force the seals in the longitudinal direction towards transverse faces of reinforcements of the rotor. A turbulence-free gas flow is obtained as a result of the total seal obtained by the seals (19). Moreover, the rotor can be constructed with a substantially rectilinear ferrule which only induces limited stress concentrations.

Sealing device between blade stages and a rotary drum, particularly for

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Brunoy, France

Thierry Henri Tassin