Rotation enhanced rotor blade cooling using a double row of coolant passageways

摘要

A rotor blade such as a turbine rotor blade for a jet engine. The airfoil blade portion of the rotor blade has a plurality of longitudinally extending coolant passageways preferably interconnected to define a serpentine coolant circuit. Passageways channeling coolant from the blade root to the blade tip are positioned in a first row proximate the pressure side of the airfoil blade while passageways channeling coolant from the blade tip to the blade root are positioned in a second row adjacent the first row and proximate the suction side of the airfoil blade to take advantage of the Coriolis force acting on the coolant in the passageways of the rotating blade to improve overall heat transfer effectiveness.