Patent ID: 7955053

Claim:
A turbine rotor blade comprising: a triple pass serpentine flow cooling circuit formed within the blade to provide cooling for the blade; the triple pass serpentine flow cooling circuit including a first leg located along the leading edge of the blade, a second leg located in the mid-chord region of the blade, and a third leg located along the trailing edge region of the blade; a leading edge rib separating the first leg from the second leg, the leading edge rib being slanted toward the leading edge of the blade such that the first leg channel decreases in the cross sectional flow area and directs the cooling to flow toward a tip corner of the leading edge of the blade; a trailing edge rib separating the second leg from the third leg, the trailing edge rib being slanted toward the trailing edge of the blade such that the third leg channel decreases in the cross sectional flow area.