| 摘要 |
PROBLEM TO BE SOLVED: To provide a configuration for controlling flow instability in a steam turbine when the steam turbine operates under low volumetric conditions, particularly during starting and low load conditions.SOLUTION: There is provided a configuration (10) of the last stage of a steam turbine where rotor blades (2) rotate encircled by a vane carrier (1). A plurality of passages (20) are located in the vane carrier (1), such that a fluid is blown from the passages (20) upstream of the rotor blades (2), and arranged to form a flow that impinges onto the rotor blades (2) with an injection angle between 0 to -90 degrees against the rotation of the rotor blades (2), such that rotating flow instability in the rotor blades (2) is reduced when the steam turbine operates under low volumetric flow conditions. |
