US 11,719,132 B2
Turbine stator blade and steam turbine
Shunsuke Mizumi, Tokyo (JP); Chongfei Duan, Tokyo (JP); Yasuhiro Sasao, Yokohama (JP); and Soichiro Tabata, Yokohama (JP)
Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD., Tokyo (JP)
Appl. No. 17/433,331
Filed by Mitsubishi Power, Ltd., Yokohama (JP)
PCT Filed Feb. 14, 2020, PCT No. PCT/JP2020/005867
§ 371(c)(1), (2) Date Aug. 24, 2021,
PCT Pub. No. WO2020/175192, PCT Pub. Date Sep. 3, 2020.
Claims priority of application No. JP2019-033564 (JP), filed on Feb. 27, 2019.
Prior Publication US 2022/0154586 A1, May 19, 2022
Int. Cl. F01D 25/32 (2006.01); F01D 9/04 (2006.01); F01D 5/14 (2006.01)
CPC F01D 25/32 (2013.01) [F01D 5/141 (2013.01); F01D 9/041 (2013.01); F05D 2220/31 (2013.01); F05D 2240/12 (2013.01); F05D 2260/602 (2013.01); F05D 2300/51 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A turbine stator blade comprising:
a pressure side extending in a radial direction intersecting a flow direction of steam and facing upstream in the flow direction,
wherein a slit extending in the radial direction and capturing a liquefied component of the steam is formed on a downstream side of the pressure side,
a hydrophilic uneven region having a liquid film capacity greater than that of the pressure side by being recessed in a depth direction intersecting the pressure side is formed in a further upstream position than the slit, and
the hydrophilic uneven region has a depth in the depth direction increasing and a flow resistance decreasing toward downstream and toward the slit.