TURBOMACHINE BLADE WITH IMPROVED COOLING Russian patent published in 2023 - IPC F01D5/18 

FIELD: turbomachine.

SUBSTANCE: invention is related to a turbine blade comprising a root portion supporting a blade ending in a tip-shaped end portion, the blade having an inner surface wall and an outer surface wall, as well as a leading edge, a trailing edge and an end wall defining the bottom of the tip, through which the inner surface wall connected to the wall of the outer surface, said blade also includes: a serpentine middle contour (28) including a first radial tube (41) which collects air at the root and is connected through a first bend (46) to a second radial tube (42), which is connected by means of a second bend (47) to a third radial tube (43); a cavity (36) under the tip, running along the wall (21) of the outer surface and extending from the central region of the end part (S) to the trailing edge (17); a central radial tube (34) collecting air at the root and extending between at least two of the three tubes (41, 42, 43) of the middle circuit (28) and directly supplying the cavity (36) under the tip.

EFFECT: airflow required to cool the blade's midsection is reduced to promote better cooling of critical portions of the blade, such as the bottom surface wall in the tip region near the trailing edge.

15 cl, 10 dwg