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Title:
FILM COOLING STRUCTURE, AND TURBINE BLADE FOR GAS TURBINE ENGINE
Document Type and Number:
WIPO Patent Application WO/2020/246289
Kind Code:
A1
Abstract:
A film cooling structure 10 has a wall section 20 that extends from front to rear, and a cooling hole 30 that has a tubular inner peripheral surface 31 and is inclined such that the outlet 33 is located more rearward than the inlet 32. The cooling hole 30 comprises a throat 35 having the smallest cross-sectional area, and a diffuser section 36 extending from the throat 35 to the outlet 33 and including a flow path cross-section 36A that increases in size towards the outlet 33, the cross-section expanding rearward and along the wall section 20. The inner peripheral surface 31 of the cooling hole 30 comprises: a flat part 31a that is orthogonal to the direction of extension of the cooling hole 30 at a front-side site 31c of the inner peripheral surface and extends in a direction running along the wall section 20; and a convex part 31b that protrudes out from a rear-side site 31d of the inner peripheral surface 31 toward the flat part 31a, extends parallel to the flat part 31a, and, together with the flat part 31a, forms the throat 35.

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Inventors:
KUBO SEIJI (JP)
HATTORI HITOSHI (JP)
OKITA YOJI (JP)
FUJIMOTO SHU (JP)
IKEHARA RYO (JP)
Application Number:
PCT/JP2020/020550
Publication Date:
December 10, 2020
Filing Date:
May 25, 2020
Export Citation:
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Assignee:
IHI CORP (JP)
International Classes:
F01D5/18; F01D9/02; F02C7/18
Foreign References:
US20160153283A12016-06-02
JP2006242187A2006-09-14
JP2016519236A2016-06-30
US20160201474A12016-07-14
JPS56449B11981-01-08
JP2013124612A2013-06-24
Other References:
See also references of EP 3981953A4
Attorney, Agent or Firm:
MIYOSHI Hidekazu et al. (JP)
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