ceramic core, use of a ceramic core, manufacturing method for fabricating a hollow turbine blade for a turbine engine, and turbine engine

摘要

a ceramic core used for the production of a hollow turbine blade of a turbomachine by the lost wax casting method and formed to constitute the cavities of said blade into a single component, comprising, in order to supply together the interior of said cavities with cooling air, the core portions (60, 62) for forming the first and second side cavities connected to a core portion (48) for forming at least one central cavity at the core foot (54) for at least at least two ceramic joints (70) as well as at different heights of said core by a plurality of other ceramic joints (64, 66, 68), the positioning of which defines the thickness of the internal blade partitions, while ensuring a cooling air complement for the predetermined critical zones of the first and second side cavities.