AXIAL TURBOMACHINE AND BLADE THEREOF Russian patent published in 2020 - IPC F01D5/14 

FIELD: machine building.

SUBSTANCE: provided is a blade for an axial turbomachine, including: a profile section of the blade; an end wall having a wall surface of the flow channel located at least on the side of the sleeve of the profile section of the blade and intended for separation of part of the circular channel of the working fluid flow; and fillet located at boundary between profile section of blade and wall surface of flow channel. Filament on the outside is shaped so that it has an arched curvilinear surface having a radius R if viewed in a section perpendicular to the surface of the wall of the flow channel and the blade surface of the profile section of the blade. Narrow section available on the wall surface of the flow channel is designed so that the distance d between the outer edge of the projection of the profile section of the blade on the surface of the wall of the flow channel and the outer edge of the surface of the wall of the flow channel is less than the maximum value of the radius R of the fillet. Upper end of the fillet on the narrow section is located lower than in the area different from the narrow section, and the lower end of the arc-shaped curvilinear surface coincides with the wall surface of the flow channel along the whole periphery of the profile section of the blade.

EFFECT: present invention provides high aerodynamic characteristics and high reliability of the blade in a well-balanced manner.

7 cl, 11 dwg