CONTROLLING COOLING FLOW IN COOLED TURBINE VANE OR BLADE USING IMPINGEMENT TUBE Russian patent published in 2018 - IPC F01D5/14 

FIELD: machine building.

SUBSTANCE: airfoil for a gas turbine, wherein the airfoil comprises an outer shell comprising an inner volume and an inner shell arranged within the inner volume of the outer shell. Inner shell comprises an inner nose section and an inner tail section. High pressure side of the inner shell is formed along a first surface section between the inner nose section and the inner tail section. Low pressure side of the inner shell is formed along a second surface section which is located opposite to the first surface section between inner nose section and the inner tail section. Inner shell is spaced apart from the outer shell such that a first cooling channel is formed along the high pressure side between the inner nose section and the inner tail section, a second cooling channel is formed along the low pressure side between the inner nose section and the inner tail section. First cooling channel and second cooling channel merge into a common cooling channel at the inner tail section. First tail fin is arranged between the first cooling channel and the common cooling channel such that a first mass flow rate of the cooling fluid flowing through the first cooling channel is controllable. Second tail fin is arranged between the second cooling channel and the common cooling channel such that a second mass flow rate of the cooling fluid flowing through the second cooling channel is controllable. First tail fin comprises at least a first through-hole for forming a first fluid passage. Second tail fin comprises at least a second through-hole for forming a second fluid passage.

EFFECT: invention is aimed at increasing the efficiency of cooling and facilitating the manufacture of a blade.

12 cl, 7 dwg