Bucket for a turbine of a thermal power plant having a foot section

摘要

A bucket (20; 22) for a turbine (10) of a thermal power plant is provided. The turbine (10) has a rotor axis (14) and a main flow channel (18) for ducting a propulsion fluid in a flow direction (19) along the rotor axis (14), the bucket (20; 22) comprising a foot section (24; 134) for mounting the bucket (20; 22) within the turbine (10), wherein the foot section (24; 134) has an exposed portion (25; 135), which is in the mounted state exposed to the propulsion fluid and comprises an upstream surface (44; 144) and a flow channel surface (46; 146), wherein the upstream surface (44; 144) extends transversely to the rotor axis (14) and faces opposite to the flow direction (19), and the flow channel surface (46; 146) partially delimits the main flow channel surface (18) in a radial direction. According to the invention a transition surface (48; 148) is provided connecting the upstream surface (44; 144) and the flow channel surface (46; 146), which transition surface (48; 148) has a rounded profile in a sectional view along said rotor axis (14).