Snecma

Snecma Moteurs

Jacky Tabardin

Maurice Guy Judet

Jacques Boury

Didier Guerche

A turbine blade of a turbomachine, having at least a bottom platform connected to the base of the blade by a bottom connection zone, and a cooling circuit consisting of at least one cooling cavity, of a plurality of evacuation slots arranged along the trailing edge of the blade, said blade having a bottom evacuation slot that is disposed near the blade base, the bottom evacuation slot including an end wall provided with an opening that opens into the cavity, a setback wall, a bottom wall disposed beside the blade base, a bottom edge formed between the setback wall and the bottom wall, and a bottom shoulder formed between the bottom wall and the bottom connection zone, both the bottom edge of the bottom evacuation slot and the bottom shoulder of the bottom evacuation slot having respective right sections of substantially rounded shape, thereby avoiding any protruding angles between the opening of said slot and the bottom connection zone.

Cooling air evacuation slots of turbine blades

A process for the manufacture of a part includes the steps of forming a core in a ceramic material, inserting the core into in a wax mold, placing an element on the core thereby forming a spacer between the core and an internal wall of the wax mold, forming a wax model of the part with the core by injecting wax into the mold, forming a shell mold in ceramic material from the wax model, removing the wax, and pouring casting metal into the shell mold, wherein the element is of elongated form and placed on the core in a laying position.

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Villiers le Bel, France

Jacky Tabardin