Turbine vane, a turbine, and, remodeling method of the turbine stator blades

Turbine vane (3), the blade body (21), the blade body radially inner provided at the end plate of the inner shroud (21) (22), the vane body radially outer (21) comprising a plate-like outer shroud provided at the end (23), the. The vane body (21) is formed by meandering in its interior in the radial direction, comprises serpentine passage cooling medium flows (30). Inner shroud (22) has one end open to the downstream end of the serpentine flow path (30), open to the edge (22D) after the other end the inner shroud (22), the inner serpentine flow path (30) a cooling passage for communicating the outside of the shroud (22) (40).