GAS TURBINE VANE WITH AERODYNAMIC PROFILE AND PROFILED HOLES ON BACK EDGE FOR COOLING AGENT DISCHARGE Russian patent published in 2015 - IPC F01D5/18 

FIELD: machine building.

SUBSTANCE: working vane or the deflector vane with at least one internal radial channel for circulation of the cooling agent limited by a high pressure wall on a high pressure surface and a low pressure wall on a low pressure surface that are connected in a radially oriented forward edge upstream and in a back edge downstream, contains at least one outlet hole located at least in one of the following places - in a wall on the increased pressure side or in a wall on the decreased pressure side for the cooling agent discharge from the internal radial channel into ambient air. Along the back edge at least one output hole communicated with a high pressure surface of the back edge is located. On the high pressure surface of the working vane / deflector vane the back edge contains a ledge facing towards a low pressure surface. At least one output hole on the back edge is partially communicated with ambient air in the zone o the named ledge. The outlet hole on the back edge is designed so that the cooling agent is brought to it along the channel only partially opened in the radially located surface of the ledge front edge. The channel passes at least partially along the length of the ledge bottom surface with formation of a hole with cut.

EFFECT: invention is aimed at improvement of film cooling of the vane back edge.

14 cl, 12 dwg