Inner ventilation blade

Abstract

A blade, for example of a high-pressure turbine, is designed with an internal partition ( 9 ) closest to the trailing edge ( 7 ), the upper portion of which ( 20 ) veers towards this edge, in order to improve ventilation of the cooling gases in the area of the apertures ( 15 ) of this edge, and more generally the ventilation of the upper corner of the blade, through the creation of new apertures ( 14′ ) in the apex ( 11 ), or by moving apertures ( 12 ) starting in the second cavity and leading to the intrados in the area of the trailing edge.

1 . A blade ( 1 ) including internal cavities ( 4 ,  6 ,  8 ) for the circulation of cooling gases, where the cavities are separated by partitions ( 5 ,  9 ), where one of the partitions ( 9 ), that closest to the trailing edge ( 7 ) of the blade, is more inclined towards the trailing edge from a height of at least 70% of the blade, measured from a platform ( 3 ) of the blade to an outer edge radius, characterised in that one of the cavities ( 8 ), delimited in the area of the trailing edge of the blade by the said partition ( 9 ) closest to the trailing edge of the blade, includes a series of piercings leading to a lateral face of the blade, where the said piercings emerge in the said cavity ( 8 ) through apertures ( 21 ) placed in a line parallel to the said partition ( 9 ). 
     
     
         2 . A blade according to  claim 1 , characterised in that the greater inclination gradually becomes less great.