US 12,221,900 B2
Stationary turbine blade and steam turbine
Chongfei Duan, Tokyo (JP); Shunsuke Mizumi, Tokyo (JP); Soichiro Tabata, Yokohama (JP); and Koji Ishibashi, Yokohama (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Jan. 12, 2023, as Appl. No. 18/096,129.
Application 18/096,129 is a continuation of application No. PCT/JP2021/025171, filed on Jul. 2, 2021.
Claims priority of application No. 2020-136246 (JP), filed on Aug. 12, 2020.
Prior Publication US 2023/0167746 A1, Jun. 1, 2023
Int. Cl. F01D 9/02 (2006.01); F01D 5/14 (2006.01); F01D 5/28 (2006.01); F01D 25/24 (2006.01); F01D 25/32 (2006.01)
CPC F01D 9/02 (2013.01) [F01D 25/24 (2013.01); F05D 2240/14 (2013.01)] 10 Claims
OG exemplary drawing
 
1. 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.