TURBINE ROTOR BLADE CASCADE TURBINE STAGE AND AXIAL FLOW TURBINE

摘要

A turbine blade rotor comprising a plurality of turbine rotor blades arranged along a circumferential direction of the hub, wherein the blade flow path has a first cross-sectional shape perpendicular to the radial direction at a first position in the radial direction of the hub, And a second cross-sectional shape perpendicular to the radial direction, wherein the first cross-sectional shape has a throat portion between the inlet and the outlet of the wick channel in the axial direction of the hub Wherein a flow path width of the first cross sectional shape at the outlet of the flow path channel is A1 and a flow path width of the first cross sectional shape at the throat portion is B1 and a second cross sectional shape A2 / B2 where A2 is the flow path width of the first cross-sectional shape and A2 is the flow path width of the second cross-sectional shape at the same position as the throat portion in the axial direction of the hub.;