Patent ID: 9599411
Date: 2017-03-21
CPC Classifications: F01D,F05D,F23R,F28F,Y02T

Claim:
1. A double-jet type film cooling structure comprising: one or more pairs of injection holes which are provided on a wall surface facing a high-temperature gas passage and inject a cooling medium to the passage; a single supply passage provided inside a wall to supply the cooling medium to each pair of injection holes; and a separating section provided between the injection holes forming each pair in a location forward relative to rear ends of the injection holes to separate the cooling medium supplied from the supply passage into components flowing to the injection holes forming each pair, respectively; wherein an injection direction of the cooling medium is set to be inclined with respect to a flow direction of a high-temperature gas so that the components of the cooling medium injected from the injection holes forming each pair form swirl flows oriented in directions to push the components of the cooling medium against the wall surface; the separating section is positioned with an inclination angle that is formed relative to a virtual plane that is orthogonal to a direction in which the cooling medium travels in the supply passage and on a rearward side of the virtual plane relative to the direction in which the cooling medium travels, such that a surface of the separating section approaches a center axis of the supply passage in the direction in which the cooling medium travels, and is formed as a flat surface against which a part of the cooling medium collides and which has no bent portion, the separating section extending from a passage of the cooling medium formed inside of the wall to the wall surface; and the injection holes forming each pair are circular holes opened on the wall surface from an oblique direction and are opened in a substantially oval shape on the wall surface.