Guide bucket for a turbine of a thermal power plant having a foot section

摘要

A bucket (22; 20) for a turbine (10) of a thermal power plant is provided. The bucket (22; 20) comprises a foot section (33; 124) for mounting the bucket (22; 20) to an other element (16; 12) of the turbine (10), the foot section (33; 24) having an exposed portion (35; 135), which is during the operation of the turbine (10) directly exposed to a leakage fluid flow (56) of the propulsion fluid leaking through a sealing area (44) between the other element (16; 12) and a second bucket (20; 22) arranged adjacent to the first bucket (22; 20), wherein the leakage fluid flow (56) has a given flow direction (58). According to the invention the exposed portion (35; 135) of the foot section (33; 24) comprises a re-directing zone (50; 150) for re-directing the flow direction (58) of the leakage fluid flow (56), wherein the re-directing zone (50; 150) has a concave shape.