Rotor blade and corresponding turbine

摘要

A rotor blade includes an airfoil 46 having a tip plate 70 that extends across an outer radial end 60. A rim 72 extends radially outward from the tip plate 70 and surrounds at least a portion of the airfoil and includes a concave portion 74 opposed to a convex portion 76. A plurality of dividers 80 extend between the concave and convex portions to define a plurality of pockets 82 between the concave and convex portions at the outer radial end. A plurality of cooling passages 84 through the tip plate provide fluid communication through the tip plate to the plurality of pockets. A first fluid passage 86 in at least one divider provides fluid communication between adjacent pockets across the at least one divider.