Transverse wall of a combustion chamber provided with multi-perforation holes
View Patent ↗An annular wall which transversely connects longitudinal walls of an annular combustion chamber of a turbine engine is disclosed. The wall is essentially flat, inclined in relation to a longitudinal axis of the turbine engine, and includes a plurality of deflectors, each formed by an essentially rectangular flat sheet. The deflectors are mounted on the wall and each includes an aperture for the installation of a fuel injection system, a plurality of multi-perforation holes formed in relation to the deflectors around their aperture so as to allow a passage of air intended for the cooling of the deflectors, and a flow forcing unit which forces the flow of air for cooling the deflectors to flow radially around the fuel injection systems.
1. An annular wall transversely connecting longitudinal walls of an annular combustion chamber of a turbine engine, said wall being essentially flat and inclined in relation to a longitudinal axis of the turbine engine, the wall comprising:
a plurality of deflectors, each formed by an essentially rectangular flat sheet with an external radial end, an internal radial end, and first and second lateral ends which connect the external radial end and the internal radial end, said deflectors being mounted on the annular wall and each comprising an aperture for the installation of a fuel injection system; and
a plurality of multi-perforation holes formed in relation to the deflectors around the aperture of the deflector so as to allow a passage of air for cooling the deflectors;
wherein each deflector includes a flow forcing unit which forces the air for cooling the deflectors to flow radially in relation to the longitudinal axis of the turbine engine around the fuel injection systems,
wherein each deflector includes first and second deformations which form chicanes for the movement of the flow of cooling air, the first deformation is disposed between the first lateral end and the aperture and extends radially in relation to the longitudinal axis of the turbine engine from a first end to a second end and the second deformation is disposed between the second lateral end and the aperture and extends radially in relation to the longitudinal axis of the turbine engine from a third end to a fourth end, and
wherein a circumferential distance between the first end and the third end is provided so as to allow passage of cooling air around the fuel injection systems.
2. The wall according to claim 1 , wherein the deformations of the deflector are in the form of throats.
3. The wall according to claim 2 , wherein the throats each have a thickness of between 1 and 2 mm.
4. An annular wall transversely connecting longitudinal walls of an annular combustion chamber of a turbine engine, said wall being essentially flat and inclined in relation to a longitudinal axis of the turbine engine, the wall comprising:
a plurality of deflectors, each formed by an essentially rectangular flat sheet with an external radial end, an internal radial end, and first and second lateral ends which connect the external radial end and the internal radial end, said deflectors being mounted on the annular wall and arranged circumferentially about an axis of the combustion chamber such that the lateral ends are adjacent and abutting, and each comprising an aperture for the installation of a fuel injection system; and
a plurality of multi-perforation holes formed in relation to the deflectors around the aperture of the deflector so as to allow a passage of air for cooling the deflectors;
wherein each deflector includes a flow forcing unit which forces the air for cooling the deflectors to flow radially in relation to the longitudinal axis of the turbine engine around the fuel injection systems, and
wherein the external radial end of the deflector is curved such that a radial distance between an external radial end of the wall and the external radial end of the deflectors at a radial plane of symmetry of the deflectors is less than a radial distance between the external radial end of the wall and the external radial end of the deflectors at the lateral ends of the deflectors.
5. The wall according to claim 1 , wherein a radial distance between an external radial end of the wall and the external radial end of the deflectors at a radial plane of symmetry of the deflectors is greater than a radial distance between the external radial end of the wall and the external radial end of the deflectors at the lateral ends of the deflectors.
6. A combustion chamber of a turbine engine, comprising at least one annular wall according to claim 1 .
7. A turbine engine comprising a combustion chamber having at least one annular wall according to claim 1 .
8. The wall according to claim 1 , wherein each deformation is arcuate and extends between an internal radial end and an external radial end of the deflector.
9. The wall according to claim 1 , wherein the deformations are provided in portions of the deflector which do not face the plurality of multi-perforation holes.
10. The wall according to claim 1 , wherein a circumferential distance between the second end and the fourth end is provided so as to allow passage of cooling air around the fuel injection systems.