Title:
ROTOR BLADE AND GAS TURBINE PROVIDED THEREWITH
Document Type and Number:
WIPO Patent Application WO/2023/127211
Kind Code:
A1
Abstract:
This rotor blade comprises: a blade body extending in a blade height direction that is a direction perpendicular to an airfoil cross-section; and a platform that is provided to an end at a hub side, from between a tip side and the hub side which are of the blade height direction of the blade body. The blade body comprises: an anterior edge and a posterior edge; a ventral surface and a dorsal surface linking the anterior edge and the posterior edge together; and a cooling passage extending in the blade height direction between the ventral surface and the dorsal surface. The distance between an inner peripheral surface in the cooling passage and the dorsal surface is a dorsal wall thickness. The distance between the inner peripheral surface and the ventral surface is a ventral wall thickness. The ratio of the ventral wall thickness to the dorsal wall thickness is the ventral/dorsal wall thickness ratio. A position at 5 to 15% of the distance from the platform to the tip-side end of the blade body is a hub-side position, a position at 25 to 35% is a middle position, and a position at 90 to 100% is a tip-side position. The ventral/dorsal wall thickness ratio at any position between the hub-side position and the middle position in the cooling passage is smaller than the ventral/dorsal wall thickness ratio at any position between the middle position and the tip-side position.
Inventors:
WAKAZONO SUSUMU (JP)
HADA SATOSHI (JP)
HADA SATOSHI (JP)
Application Number:
PCT/JP2022/035645
Publication Date:
July 06, 2023
Filing Date:
September 26, 2022
Export Citation:
Assignee:
MITSUBISHI POWER LTD (JP)
MITSUBISHI HEAVY IND LTD (JP)
MITSUBISHI HEAVY IND LTD (JP)
International Classes:
F01D5/18; F02C7/18
Foreign References:
| US20190338649A1 | 2019-11-07 | |||
| US5813835A | 1998-09-29 | |||
| JPH09133001A | 1997-05-20 | |||
| JP2001214703A | 2001-08-10 | |||
| JP2005155606A | 2005-06-16 | |||
| JP2021071085A | 2021-05-06 | |||
| JPH05195704A | 1993-08-03 | |||
| JP2011214575A | 2011-10-27 | |||
| US20210207493A1 | 2021-07-08 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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