Multi-pierced combustion chamber with counter-rotating tangential flows

摘要

A combustion chamber, for example for a turbine engine, presenting an inner annular wall, an outer annular wall, and a pierced annular chamber end wall extending around an axis, the chamber end wall including at least one opening receiving a fuel injector, the opening being substantially centered on a circular line defining a first chamber end wall portion extending radially between the circular line and the inner annular wall, and a second chamber end wall portion extending radially between the circular line and the outer annular wall. First and second channels are inclined relative to a normal vector normal to the chamber end wall while extending tangentially, the first channels arranged to provide a flow of air in a first rotary direction, the second channels arranged to provide a flow of air in a second rotary direction opposite to the first rotary direction.

主权项

1. A combustion chamber presenting an annular shape about an axis, comprising:
an inner annular wall, an outer annular wall, and an annular chamber end wall extending around the axis, the annular chamber end wall extending radially between the inner annular wall and the outer annular wall, the annular chamber end wall including at least one opening which receives a fuel injector, the at least one opening being centered on a circular line, the circular line defining a first chamber end wall portion extending radially between the circular line and the inner annular wall and a second chamber end wall portion extending radially between the circular line and the outer annular wall; a plurality of first channels formed in the first chamber end wall portion and located radially between a radially innermost end of the at least one opening and the circular line; and a plurality of second channels formed in the second chamber end wall portion and located radially between a radially outermost end of the at least one opening and the circular line, wherein the annular chamber end wall is connected to upstream ends of the inner annular wall and the outer annular wall so as to extend radially between the upstream ends of the inner annular wall and the outer annular wall and continuously with the inner annular wall and the outer annular wall, wherein the plurality of first channels and the plurality of second channels are inclined relative to a normal vector normal to the annular chamber end wall while extending tangentially, in a frame of reference (ur, uθ, Z) defined relative to the axis, ur being a radial axis, uθ being a circumferential axis, and Z being an axis parallel to the axis, a tangential direction is a direction parallel to the circumferential axis uθ, wherein the radially innermost end of the at least one opening and the radially outermost end of the at least one opening lie on the radial axis, wherein the plurality of first channels directs air to flow around the axis in a first rotary direction while the plurality of second channels directs air to flow around the axis in a second rotary direction opposite to the first rotary direction, wherein a projection of each of the plurality of first channels and each of the plurality of second channels onto a plane orthogonal to the axis is tangential to a circle centered on the axis, and wherein a radial width of the air flowing in the first rotary direction directed by the plurality of first channels is substantially equal to a radial width of the first chamber end wall portion extending radially between the circular line and the radially innermost end of the at least one opening, and a radial width of the air flowing in the second rotary direction directed by the plurality of second channels is substantially equal to a radial width of the second chamber end wall portion extending radially between the circular line and the radially outermost end of the at least one opening.