ANNULAR COMBUSTION CHAMBER WALL ARRANGEMENT

摘要

An annular combustion chamber wall arrangement includes an annular wall and a plurality of tiles and each tile is secured to and is spaced from a further annular wall. The first surface of each tile faces the annular wall and the second surface of each tile faces away from the annular wall. Each tile has a plurality of pedestals extending away from the first surface towards the annular wall and/or a plurality of effusion cooling apertures extending through the tile from the first surface to the second surface. At least one of the tiles has the pedestals and/or the effusion cooling apertures arranged in a predetermined pattern which provides the tile with a more uniform stiffness in all directions to reduce the possibility of cracking of the tile. In one predetermined pattern the pedestals are arranged in a Fermat's (parabolic) spiral with the pedestals arranged with Fibonacci number ordering.

主权项

1. An annular combustion chamber wall arrangement comprises an annular wall, the annular wall has a first surface and a second surface, the wall has a plurality of pedestals extending away from the first surface and/or a plurality of effusion cooling apertures extending through the annular wall from the first surface to the second surface, the annular wall has the pedestals and/or the effusion cooling apertures arranged in a predetermined pattern, wherein the predetermined pattern provides the annular wall with a substantially uniform stiffness in all directions.