Impingement cooled structure

F - Mech Eng,Light,Heat,Weapons – 01 – D

Patent

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Details

F01D 25/24 (2006.01) F02C 7/18 (2006.01)

Patent

CA 2644099

An impingement cooling structure comprises a plurality of shroud members (10) connected to each other in the circumferential direction so as to form a ring-shaped shroud surrounding a hot gas flow and a shroud cover (20) installed on the radial outer surfaces of the shroud members to form a hollow cavity (2) therebetween. The shroud cover has first impingement-cooling holes (22) which communicate with the cavity and perform impingement-cooling of the inner surface of the cavity by jetting cooling air to the inside of the cavity. The shroud member (10) has holed fins (12) dividing the cavity into sub-cavities. The holed fin has second impingement-cooling holes (12a) for jetting the cooling air (3), which flows from the first impingement-cooling holes into the holes (12a), diagonally toward the bottom face of the adjacent sub cavity.

La présente invention concerne une structure de refroidissement par contact qui comprend : une pluralité d'éléments enveloppe (10) reliés les uns aux autres dans la direction circonférentielle de manière à former une enveloppe en forme d'anneau qui entoure un flux de gaz chaud ; et un élément couvrant l'enveloppe (20) disposé sur les surfaces externes radiales des éléments enveloppe en vue de former une cavité creuse (2) entre eux. L'élément couvrant l'enveloppe possède de premiers orifices de refroidissement par contact (22) qui communiquent avec la cavité et refroidissent par contact la surface interne de la cavité en y projetant de l'air refroidissant. L'élément enveloppe (10) est doté d'ailettes percées (12) qui divisent la cavité en sous-cavités. L'ailette percée possède de seconds orifices de refroidissement par contact (12a) en vue de projeter diagonalement de l'air refroidissant (3), qui s'écoule dans les orifices (12a) depuis les premiers orifices de refroidissement par contact, vers la face inférieure de la sous-cavité adjacente.

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