Gas turbine engine combustion chambers

Claim 1

A gas turbine engine combustion chamber comprising: an upstream wall member including an upstream wall portion and a spaced downstream wall portion having a downstream face, said upstream wall portion and said spaced downstream wall portion defining a chamber therebetween arranged to receive a flow of cooling air and to discharge the flow of cooling air therefrom, at least one air spray fuel burner extending through said upstream wall member for discharging in a downstream direction into the combustion chamber a cone-shaped spray of fuel and air mixture, at least a pair of facets on said downstream wall portion, said facets being set at an angle to the downstream face of said downstream wall portion, one of said pair of facets being positioned on one side of and spaced from said air spray fuel burner and the other of said pair of facets being positioned on the other side of and spaced from said air spray fuel burner, each of said pair of facets having a plurality of apertures for the flow of cooling air from said chamber to said downstream wall, said apertures in each facet being aligned to direct a flow of cooling air across a width of the downstream face of said downstream wall portion in a direction generally parallel to a part of the downstream wall portion adjacent the respective facet and in a direction toward said air spray fuel burner to cause the cooling air to directly interact with the spray of fuel and air mixture therefrom whereby combustion in a primary zone of the combustion chamber is improved.