Patent attributes
A turbine blade with a squealer pocket formed by a tip rail extending along the pressure side and suction side of the tip. A row of diffusion trenches are spaced along the pressure side tip rail and the suction side tip rail, each trench formed by side walls and a bottom wall so that the front face and top face of the trench is open. Each trench includes side walls that increase in width in the direction of the tip crown, is connected by a metering hole to discharge cooling air into the trench, are separated from each other and are spaced from near the leading edge to near the trailing edge, and includes a curved inward surface toward the squealer pocket. Two rows of convective cooling holes are spaced adjacent to the pressure side tip rail and the suction side tip rail and open into the squealer pocket.
