Title:
TURBINE BLADE AND GAS TURBINE
Document Type and Number:
WIPO Patent Application WO/2023/106125
Kind Code:
A1
Abstract:
A turbine blade comprises a blade body, a plurality of cooling passages extending in the blade height direction inside the blade body and connected to each other via folded portions, and a bypass portion that is provided in a partition wall portion partitioning a pair of adjacent cooling passages among the plurality of cooling passages and that allows the pair of cooling passages to communicate with each other. The pair of cooling passages includes an upstream passage and a downstream passage located downstream of the upstream passage with respect to the flow of a cooling fluid. The turbine blade is provided with: a plurality of cooling holes that are formed in the blade body so as to be arranged along the blade height direction, that communicate with the downstream passage, and that open in the surface of the blade body; a plurality of turbulators provided on the inner wall surface of the downstream passage and arranged along the blade height direction; or a thermal barrier coating that covers the surface of the blade body. The value of a parameter indicating a characteristic of the plurality of cooling holes, the plurality of turbulators, or the thermal barrier coating is different in the blade height direction between an upstream region positioned farther upstream with respect to the flow of the cooling fluid in the downstream passage than to a position corresponding to the bypass portion, and a downstream region positioned downstream of the upstream region with respect to the flow of the cooling fluid in the downstream passage.
Inventors:
HIRAYAMA TAKU (JP)
ITO RYUTA (JP)
ITO RYUTA (JP)
Application Number:
PCT/JP2022/043511
Publication Date:
June 15, 2023
Filing Date:
November 25, 2022
Export Citation:
Assignee:
MITSUBISHI HEAVY IND LTD (JP)
MITSUBISHI POWER LTD (JP)
MITSUBISHI POWER LTD (JP)
International Classes:
F01D5/18; F01D5/28; F01D9/02
Foreign References:
| JP2010007463A | 2010-01-14 | |||
| US20130343872A1 | 2013-12-26 | |||
| JPS58117303A | 1983-07-12 |
Attorney, Agent or Firm:
SSIP PATENT ATTORNEY CORPORATION (JP)
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