Heat shield for a gas turbine combustion chamber

F - Mech Eng,Light,Heat,Weapons – 23 – R

Patent

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Details

F23R 3/10 (2006.01) F23R 3/06 (2006.01) F23R 3/42 (2006.01) F23R 3/50 (2006.01)

Patent

CA 2209317

A heat shield for a gas turbine annular combustion chamber having a plurality of effusion holes, the central axes of which are inclined towards the heat shield surface and over which cooling air can penetrate from the rear to apply a film of cooling air to the hot surface. The surface is subdivided into sector, and transition areas between the sectors, the central axes of the effusion holes essentially being arranged in parallel to each other in a given sector or transition area. In addition, the central axes of the effusion holes in the sector; are oriented towards the assigned corner area in each case.

L'invention concerne un bouclier thermique pour la chambre de combustion annulaire d'une turbine à gaz, qui comprend une pluralité de trous d'effusion dont les axes médians sont inclinés par rapport à la surface du bouclier thermique et par l'intermédiaire desquels de l'air de refroidissement peut pénétrer depuis la face arrière, afin d'appliquer un film d'air de refroidissement sur la surface brûlante. La surface est divisée en secteurs et en zones de transition situées entre les secteurs, les axes médians des trous d'effusion étant sensiblement parallèles dans un secteur ou dans une zone de transition. Les axes médians des trous d'effusion dans les secteurs sont en outre orientés en direction de la zone d'angle correspondante du bouclier thermique.

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