摘要:
L'invention concerne une aube (10) de turbine comportant au moins une cavité (28) interne comportant une pluralité de déflecteurs (34) qui sont portés par une face interne (22i) de la paroi d'intrados (22) et par une face interne (24i) de la paroi d'extrados (24). Chaque déflecteur (34) s'étend principalement selon une direction transversale depuis la face interne (22i) de la paroi d'intrados (22) ou de la paroi d'extrados (24). Les déflecteurs sont inclinés par rapport à la direction transversale. La longueur de chaque déflecteur (34) selon la direction transversale est supérieure à la moitié de la distance transversale entre la face interne (22i) de la paroi d'intrados (22) et de la paroi d'extrados (24), de part et d'autre du déflecteur (34).
摘要:
The invention concerns a turbine blade (91) comprising a root (P), a vane extending in a spanwise direction (EV), ending at a tip (S) and comprising a leading edge and a trailing edge and a pressure-side wall and a suction-side wall, said vane further comprising: at least one upstream duct (93) configured to collect air at the root (P) to cool the leading edge, discharging said air through holes passing through the wall of the leading edge; at least one downstream duct (96) separate from the upstream duct (93) and configured to collect air at the root (P) to cool the trailing edge, discharging said air through holes (97) passing through the pressure wall upstream from the trailing edge; an inner side cavity (101) running along the pressure-side wall to form a heat shield insulating the downstream duct (96).
摘要:
The internal cooling of the moving blades of the turbines in aircraft turbomachines is limited in effectiveness because of inhomogeneities of this cooling on each of the pressure-face and suction-face walls. To address this problem, there is proposed a blade comprising a circuit (50) for cooling the airfoil part (34) thereof, in which circuit the cavities interconnected in series are such that the stream of air flows radially toward the outside along the pressure-face wall (40) in pressure-face cavities (52, 56), and radially toward the inside along the suction-face wall (42) in a suction-face cavity (54) that is separated from the pressure-face cavities by an internal wall (58) of the airfoil part. In this way, the force of the Coriolis effect deflects the stream of air toward each of the pressure-face and suction-face walls thereby limiting the inhomogeneity.
摘要:
The invention concerns a turbine blade (11) for a turbomachine, comprising a vane (12) extending in a spanwise direction between a root and a tip, a first inner side cavity (54) running along the pressure-side wall (21) and a second inner side cavity (56) running along the suction-side wall. The blade (11) further comprises at least one inner central duct (53) configured to collect air intended to cool the vane (12). The central duct (53) extends between the side cavities (54, 56), being separated from the side cavities (54, 56) so as to be at least partially thermally isolated from the pressure-side wall (21) and the suction-side wall. The side cavities (54, 56) communicate with each other in a junction region (72) located downstream from the central duct (53), over the majority of the height of the central duct in the spanwise direction.