Film cooling channel array with multiple metering portions

A cooling channel array carried by a component wall of a gas turbine engine, the component wall having a first surface and a second surface, the cooling channel array comprising:

• a diffusion cavity defined by a face carried by the component wall, the diffusion cavity defining a central axis and having an outlet on the second surface, the face having at least two side surfaces;
• a convex raised contoured bottom surface in the diffusion cavity on the face and below the second surface, the raised contoured bottom surface forming a corner with the face, being separated from the second surface by the face;
• at least two slightly convex lower side surfaces, each slightly convex lower side surface being between the convex raised contoured bottom surface and one of the side surfaces of the face, respectively forming a straight groove with one of the side surfaces of the face, and respectively forming a curved edge with the convex raised contoured bottom surface, each curved edge curving convexly toward the central axis;
• and
• a metering section comprising at least two metering portions that communicate with the diffusion cavity, each metering portion extending from an inlet located on the first surface to a metering portion outlet located on the face of the diffusion cavity;
• wherein
• the diffusion cavity comprises two or more lobes, each lobe partly defined by the convex raised contoured bottom surface.