Engine article with integral liner and nozzle
A core engine article includes a combustor liner defining a combustion chamber therein and a turbine nozzle. The combustor liner includes a plurality of injector ports, and the plurality of injector ports have a shape that tapers to a corner on a forward side of the injector ports. The turbine nozzle includes a plurality of airfoils. The combustor liner and turbine nozzle are integral with one another. A method of making a core engine article is also disclosed.
1. A method of making a core engine article, comprising:
depositing material using an additive manufacturing technique to form a turbine nozzle in a build direction, and
depositing material using the additive manufacturing technique to form a combustor liner in the build direction, wherein the combustor liner is supported by the turbine nozzle during the build.
2. The method of claim 1 ,
wherein forming the combustor liner includes forming a plurality of injector ports, and the injector ports have a maximum dimension greater than 0.1 in (0.254 cm).
3. The method of claim 2 , wherein the plurality of injector ports have a shape that tapers to a corner on a top side with respect to the build direction.
4. The method of claim 3 , wherein the plurality of injector ports are diamond-shaped.
5. The method of claim 2 ,
wherein forming the plurality of injector ports includes forming a webbing extending outward from the combustor liner along an extent of a periphery of the plurality of the injector ports.
6. The method of claim 5 , wherein forming the turbine nozzle includes forming a plurality of airfoils on an outer surface of the turbine nozzle, the airfoils having an orientation with respect to the build direction such that they are self-supporting during the build.
7. The method of claim 6 ,
wherein the airfoils are each built along an airfoil axis, and
an angle α between the airfoil axis and the build direction is greater than 32 degrees.
8. The method of claim 7 ,
wherein the angle α is 45 degrees.