TURBOMACHINE COOLED BLADE (VERSIONS) Russian patent published in 2005 - IPC

FIELD: mechanical engineering; turbomachines.

SUBSTANCE: proposed cooled blade of turbomachine contains airfoil portion with central space and radial channel in zone of leading edge and communicating, through alternating in height inlet and outlet channels, with central part and outer surface of airfoil portion. Inlet channel are made along convex surface of airfoil portion. Outlet channels are made along concave surface of airfoil portion and are in communication with outer surface of airfoil surface in its trailing edge. Blade is provided with additional outlet channels made along convex surface of airfoil portion of blade and connected by inlets with central space and by outlets, with outlet surface of airfoil portion of blade in its trailing edge. All outlet channels are made with tilting relative to longitudinal axis of airfoil portion, and part of them communicates with outlet surface of airfoil portion of blade in trailing edge by means of common channel connected by inputs with outlet channels and by outlet, with trailing edge of airfoil portion. According to other design version, part of inclined outlet channels is brought out directly to end face surface of airfoil portion of blade.

EFFECT: reduced consumption of cooling air for said blade, increased efficiency of engine, increased service life of blade.

6 cl, 4 dwg