AIRFOIL WITH LEADING EDGE CONVECTIVE COOLING SYSTEM

An airfoil includes a leading edge and an opposing trailing edge. The airfoil includes a pressure sidewall and an opposing suction sidewall. A leading edge cavity (240) is defined between the pressure sidewall and the suction sidewall. The leading edge cavity has a first end opposite the leading edge and a second end defined at a rib. The airfoil includes at least one pin structure (250) defined in the leading edge cavity between the first end and the second end. The at least one pin structure includes a main body (260) and a first branch (262). The main body is coupled to the second end and extends toward the first end. The first branch extends from the main body toward the first end. Alternatively, the airfoil includes at least one pin set defined in the leading edge cavity between the first end and the second end, the at least one pin set including a first pin and a second pin, the first pin coupled to the second end and extending to an inner surface of the suction sidewall, the second pin coupled to the second end and extending toward the first end, the first pin overlapping the second pin.