Dirt and dust free turbine vane cooling

A gas turbine engine comprising:

• a turbine section comprising at least one vane assembly and at least one rotor arranged downstream from the at least one vane assembly, wherein a rotor cavity is defined between the at least one vane assembly and the at least one rotor, wherein the at least one vane assembly comprises:
• a vane having an outer diameter end and an inner diameter end, the vane defining at least a leading-edge cavity therein, wherein a direction of flow through the leading-edge cavity is from the outer diameter end toward the inner diameter end;
• an inner diameter platform arranged at the inner diameter end of the vane, the inner diameter platform having an inner diameter flow path comprising an exit at an aft side of the inner diameter platform that fluidly couples to the rotor cavity, the inner diameter platform having an inner diameter flow aperture fluidly coupling the leading-edge cavity and the inner diameter flow path, wherein the inner diameter flow path is defined within the inner diameter platform and extends between the inner diameter flow aperture and the exit;
• and
• a baffle installed within the leading-edge cavity, the baffle arranged to reduce a cross-sectional area in the direction of flow through the leading-edge cavity such that a leading-edge portion of the leading-edge cavity between an exterior surface of the baffle and an interior surface of the vane has a larger cross-sectional area proximate the outer diameter end than at the inner diameter end,
• wherein an impingement flow is directed into the baffle and a throughflow is directed into the leading-edge portion of the leading-edge cavity between the exterior surface of the baffle and the interior surface of the vane, and
• wherein the inner diameter flow aperture is positioned at least on the inner diameter platform between the exterior surface of the baffle and the interior surface of the vane and configured to provide a flow path for the throughflow from the leading-edge portion of the leading-edge cavity into the inner diameter flow path, wherein the through flow flows from the outer diameter end, through the leading-edge portion of the leading-edge cavity, and into the inner diameter flow aperture.