Patent ID: 8070441

Claim:
A turbine stator vane comprising: a cooling air impingement cavity extending in a spanwise direction of the vane for supplying cooling air to the vane, the impingement cavity being located adjacent to a trailing edge region of the vane; a first row of ribs formed within the trailing edge region of the vane, the first row of ribs extending between the pressure side wall and the suction side wall of the vane, the first row of ribs forming first mini cooling channels; a second row of ribs formed within the trailing edge region of the vane, the second row of ribs extending between the pressure side wall and the suction side wall of the vane, the second row of ribs forming second mini cooling channels, the second row of ribs being staggered with respect to the first row of ribs such that cooling air discharging from the first mini channels impinges onto the leading edge of the second row of ribs; and wherein all of the ribs are elongated in an axial direction and the ribs of the first row have an axial length greater than the axial length of the ribs of the second row.