CONTROLLING COOLING FLOW IN COOLED TURBINE VANE OR BLADE USING IMPINGEMENT TUBE

摘要

The present invention relates to an airfoil (100) for a gas turbine. The airfoil (100) comprises an outer shell (101) comprising an inner volume and an inner shell (110) arranged within the inner volume of the outer shell (101), wherein the inner shell (110) comprises an aerodynamic profile having an inner nose section (111) and an inner tail section (112). A first cooling channel (116) and a second cooling channel (117) merge into a common cooling channel (123) at an inner tail section (112). A first tail fin (118) is arranged between the first cooling channel (116) and the common cooling channel (123) such that a first mass flow rate of the cooling fluid flowing through the first cooling channel (116) is controllable. A second tail fin (119) is arranged between the second cooling channel (117) and the common cooling channel (123) such that a second mass flow rate of the cooling fluid flowing through the second cooling channel (117) is controllable.