AXIAL FLOW TURBINE

摘要

An axial flow turbine wherein a shock wave loss due to an increase in an annular band area and a loss due to separation are minimized to improve turbine efficiency. The axial flow turbine which is provided with turbine stages comprising stator blades fixed to a stationary body, and moving blades fixed to a turbine rotor, and a working fluid flow path (2) having a plurality of the turbine stages in the axial direction of the turbine is equipped with a turbine stage bypass flow path (29) which is provided within the working fluid flow path (2) so as to allow part of the working fluid flowing from the upstream side in the flow direction of the working fluid to bypass the outer peripheral side of at least one of the turbine stages to be introduced into a moving blade (13) on the downstream side in the flow direction of the working fluid of the bypassed turbine stage.