Stationary turbine blade and steam turbine
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsChongfei Duan, Shunsuke Mizumi, Soichiro Tabata, Koji Ishibashi
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Abstract
This stationary turbine blade comprises: a stationary blade main body extending in the radial direction intersecting the flow direction of steam; a hydrophilic region which is formed on the surface of the stationary blade main body and which has a higher hydrophilicity than the other parts and has the radial dimension gradually increasing toward the downstream side in the flow direction; and a collecting portion which is provided on the downstream side of the hydrophilic region and which collects a liquid film flowing along the hydrophilic region.
Claims10
A turbine stator blade comprising:
- a stator blade body extending in a radial direction intersecting a flow direction of steam;
- a hydrophilic region that is formed on a surface of the stator blade body that has a higher hydrophilicity than other portions, and that has a radial dimension gradually increasing from an upstream side of the stator blade body toward a downstream side of the stator blade body in the flow direction;
- a plurality of water-repellent regions provided on a portion of the surface of the stator blade body, each water-repellent region having a higher water repellency than the hydrophilic region;
- and
- a collecting portion provided on a downstream side of the hydrophilic region and that collects a liquid film flowing along the hydrophilic region,
- wherein the hydrophilic region is arranged between a pair of adjacent water-repellent regions of the plurality of water-repellent regions with respect to the radial direction.
Dependencies are inferred from the claim text.