| 摘要 |
<p>It is possible to suppress a profile loss of a moving blade due to radial flow without an increase in the length of a shaft of a turbine, easily set the degree of reaction on an inner circumferential side to an appropriate degree, reduce a profile loss due to supersonic inflow, and improve the turbine efficiency. A steam turbine stator vane has a trailing edge curved line on which an inflection point is provided when the stator vane is viewed from a downstream side of flow of a working fluid in an axial direction of a steam turbine. The stator vane is formed so that a projecting amount of the curved line in a rotational direction of the moving blade of the steam turbine continuously increases from a root portion of the stator vane to a tip portion of the stator vane. The tip portion of the stator vane is inclined toward the outer circumferential side of the steam turbine with respect to the flow direction of the working fluid from the upstream side to downstream side of the flow of the working fluid. The root portion is inclined toward the inner circumferential side of the steam turbine with respect to the flow direction of the working fluid from the upstream side to downstream side of the flow of the working fluid.</p> |
