Title:
FILM COOLING STRUCTURE, AND TURBINE BLADE FOR GAS TURBINE ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/246494
Kind Code:
A1
Abstract:
This film cooling structure comprises a wall part 20, and a cooling hole 30 that is inclined such that an outlet 32 is located further rearward than an inlet 31. The cooling hole 30 includes a straight pipe part 30 and a diffuser part 34. The diffuser part 34 includes: a flat surface 37; a curved surface 38 that is curved rearward and, together with the flat surface 37, forms a semi-circular or semi-elliptical flow path cross-section larger than that of the straight pipe part 33; a first section 40 in which the area of the flow path cross-section increases toward the outlet 32 of the cooling hole 30; and a second section 41 that extends from the first section 40 to the outlet 32 of the cooling hole 30, and in which the area of the flow path cross-section increases, toward the outlet of the cooling hole, at a rate of increase smaller than that of the first section 40 or in which the area of the flow path cross-section is constant. The width of the diffuser part 34 has a value at least twice the depth of the diffuser part 34.
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Inventors:
IKEHARA RYO (JP)
FUJIMOTO SHU (JP)
OKITA YOJI (JP)
KUBO SEIJI (JP)
HATTORI HITOSHI (JP)
FUJIMOTO SHU (JP)
OKITA YOJI (JP)
KUBO SEIJI (JP)
HATTORI HITOSHI (JP)
Application Number:
PCT/JP2020/021896
Publication Date:
December 10, 2020
Filing Date:
June 03, 2020
Export Citation:
Assignee:
IHI CORP (JP)
International Classes:
F01D9/02; F01D5/18; F02C7/18
Foreign References:
| JP2000087701A | 2000-03-28 | |||
| JP2000064806A | 2000-02-29 | |||
| JP2017198199A | 2017-11-02 | |||
| JPS56449B1 | 1981-01-08 | |||
| JP2013124612A | 2013-06-24 |
Other References:
See also references of EP 3981954A4
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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