TURBINE DAWN, COMPRISING A THERMALLY ISOLATED CENTRAL COOLING DUCT OF WINDOW BLINDS BY TWO JOINT SIDE CAVITIES DOWNSTREAM OF THE CENTRAL CONDUIT

摘要

The invention relates to a turbomachine turbine blade (11), comprising a blade (12) extending in a span direction between a foot and an apex, a first internal lateral cavity (54) running along the intrados wall. (21) and a second internal lateral cavity (56) along the extrados wall. The blade (11) further comprises at least one internal central duct (53) configured to collect air for cooling the blade (12). The central duct (53) extends between the lateral cavities (54, 56), being separated from the lateral cavities (54, 56) to be at least partially thermally insulated from the intrados (21) and extrados walls. The lateral cavities (54, 56) communicate with each other in a junction region (72) located downstream of the central duct (53) over most of the height of the central duct in the span direction.