Shape structure of converging divergent film cooling holes for cooling gas turbine blades

摘要

Disclosed is a shape structure of a convergent divergent film cooling hole for cooling a gas turbine blade. It is formed with a predetermined length to guide the cooling fluid and includes a passage portion divided into a first region and a second region along the longitudinal direction, wherein the first region includes an inlet through which the cooling fluid flows, and The cross-sectional area is gradually decreased along the flow direction of the cooling fluid, and the second region includes an outlet through which the cooling fluid flows, and the cross-sectional area is gradually increased along the flow direction of the cooling fluid.